<?xml version="1.0" encoding="utf-8"?>
<!--XBRL document created with Toppan Merrill Bridge  11.5.1.0 -->
<!--Based on XBRL 2.1-->
<!--Created on: 10/29/2026 8:18:10 PM-->
<!--Modified on: 10/29/2026 8:18:10 PM-->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DocumentDocumentAndEntityInformation" roleURI="http://www.osi-systems.com/role/DocumentDocumentAndEntityInformation" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#StatementCondensedConsolidatedBalanceSheets" roleURI="http://www.osi-systems.com/role/StatementCondensedConsolidatedBalanceSheets" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#StatementCondensedConsolidatedBalanceSheetsParenthetical" roleURI="http://www.osi-systems.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#StatementCondensedConsolidatedStatementsOfOperations" roleURI="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfOperations" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#StatementCondensedConsolidatedStatementsOfComprehensiveIncome" roleURI="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfComprehensiveIncome" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#StatementCondensedConsolidatedStatementsOfStockholdersEquity" roleURI="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfStockholdersEquity" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#StatementCondensedConsolidatedStatementsOfCashFlows" roleURI="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfCashFlows" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentation" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentation" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBusinessCombinations" roleURI="http://www.osi-systems.com/role/DisclosureBusinessCombinations" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBalanceSheetDetails" roleURI="http://www.osi-systems.com/role/DisclosureBalanceSheetDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureGoodwillAndIntangibleAssets" roleURI="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssets" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureContractAssetsAndLiabilities" roleURI="http://www.osi-systems.com/role/DisclosureContractAssetsAndLiabilities" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureLeases" roleURI="http://www.osi-systems.com/role/DisclosureLeases" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureRestructuringAndOtherCharges" roleURI="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherCharges" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBorrowings" roleURI="http://www.osi-systems.com/role/DisclosureBorrowings" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureStockholdersEquity" roleURI="http://www.osi-systems.com/role/DisclosureStockholdersEquity" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureCommitmentsAndContingencies" roleURI="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingencies" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureIncomeTaxes" roleURI="http://www.osi-systems.com/role/DisclosureIncomeTaxes" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureSegmentInformation" roleURI="http://www.osi-systems.com/role/DisclosureSegmentInformation" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationPolicies" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationPolicies" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationTables" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBalanceSheetDetailsTables" roleURI="http://www.osi-systems.com/role/DisclosureBalanceSheetDetailsTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureGoodwillAndIntangibleAssetsTables" roleURI="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureContractAssetsAndLiabilitiesTables" roleURI="http://www.osi-systems.com/role/DisclosureContractAssetsAndLiabilitiesTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureLeasesTables" roleURI="http://www.osi-systems.com/role/DisclosureLeasesTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureRestructuringAndOtherChargesTables" roleURI="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBorrowingsTables" roleURI="http://www.osi-systems.com/role/DisclosureBorrowingsTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureStockholdersEquityTables" roleURI="http://www.osi-systems.com/role/DisclosureStockholdersEquityTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureCommitmentsAndContingenciesTables" roleURI="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingenciesTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureSegmentInformationTables" roleURI="http://www.osi-systems.com/role/DisclosureSegmentInformationTables" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationDetails" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationEarningsPerShareDetails" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationEarningsPerShareDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationCashAndCashEquivalentsDetails" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationCashAndCashEquivalentsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationDebtSecuritiesAvailableForSaleDetails" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationDebtSecuritiesAvailableForSaleDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationFairValueOfFinancialInstrumentsDetails" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationFairValueOfFinancialInstrumentsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBasisOfPresentationDerivativeInstrumentsAndHedgingActivityDetails" roleURI="http://www.osi-systems.com/role/DisclosureBasisOfPresentationDerivativeInstrumentsAndHedgingActivityDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBusinessCombinationsDetails" roleURI="http://www.osi-systems.com/role/DisclosureBusinessCombinationsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBalanceSheetDetailsDetails" roleURI="http://www.osi-systems.com/role/DisclosureBalanceSheetDetailsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureGoodwillAndIntangibleAssetsDetails" roleURI="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureGoodwillAndIntangibleAssetsIntangibleAssetsSubjectToAmortizationDetails" roleURI="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsIntangibleAssetsSubjectToAmortizationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureGoodwillAndIntangibleAssetsEstimatedFutureAmortizationExpenseDetails" roleURI="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsEstimatedFutureAmortizationExpenseDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureContractAssetsAndLiabilitiesDetails" roleURI="http://www.osi-systems.com/role/DisclosureContractAssetsAndLiabilitiesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureLeasesDetails" roleURI="http://www.osi-systems.com/role/DisclosureLeasesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureLeasesMaturitiesOfOperatingLeaseLiabilitiesDetails" roleURI="http://www.osi-systems.com/role/DisclosureLeasesMaturitiesOfOperatingLeaseLiabilitiesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureRestructuringAndOtherChargesDetails" roleURI="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureRestructuringAndOtherChargesScheduleDetails" roleURI="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesScheduleDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureRestructuringAndOtherChargesAccruedLiabilityForRestructuringAndOtherChargesDetails" roleURI="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesAccruedLiabilityForRestructuringAndOtherChargesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBorrowingsOtherBorrowingsDetails" roleURI="http://www.osi-systems.com/role/DisclosureBorrowingsOtherBorrowingsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBorrowingsRevolvingCreditFacilityDetails" roleURI="http://www.osi-systems.com/role/DisclosureBorrowingsRevolvingCreditFacilityDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBorrowingsConvertibleSeniorNotesDue2029And2031Details" roleURI="http://www.osi-systems.com/role/DisclosureBorrowingsConvertibleSeniorNotesDue2029And2031Details" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureBorrowingsNotes2029And2031Details" roleURI="http://www.osi-systems.com/role/DisclosureBorrowingsNotes2029And2031Details" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureStockholdersEquityStockBasedCompensationDetails" roleURI="http://www.osi-systems.com/role/DisclosureStockholdersEquityStockBasedCompensationDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureStockholdersEquityOsiPlansDetails" roleURI="http://www.osi-systems.com/role/DisclosureStockholdersEquityOsiPlansDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureStockholdersEquityStockRepurchaseProgramDetails" roleURI="http://www.osi-systems.com/role/DisclosureStockholdersEquityStockRepurchaseProgramDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureCommitmentsAndContingenciesContingentAcquisitionObligationsDetails" roleURI="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingenciesContingentAcquisitionObligationsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureCommitmentsAndContingenciesGuaranteesDetails" roleURI="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingenciesGuaranteesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureIncomeTaxesDetails" roleURI="http://www.osi-systems.com/role/DisclosureIncomeTaxesDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureSegmentInformationByIndustrySegmentDetails" roleURI="http://www.osi-systems.com/role/DisclosureSegmentInformationByIndustrySegmentDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="osis-20260930.xsd#DisclosureSegmentInformationOperationsAndIdentifiableAssetsDetails" roleURI="http://www.osi-systems.com/role/DisclosureSegmentInformationOperationsAndIdentifiableAssetsDetails" xmlns="http://www.xbrl.org/2003/linkbase" />
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#InsiderTradingArrangements" roleURI="http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" xmlns="http://www.xbrl.org/2003/linkbase" />
  <presentationLink xlink:role="http://www.osi-systems.com/role/DocumentDocumentAndEntityInformation" xlink:type="extended" xlink:title="995200090 - Document - Document and Entity Information" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType" xlink:label="dei_DocumentType_639289018884766773" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentType_639289018884766773" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport" xlink:label="dei_DocumentQuarterlyReport_639289018884766773" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentQuarterlyReport_639289018884766773" order="2" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate_639289018884766773" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentPeriodEndDate_639289018884766773" order="3" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport_639289018884766773" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentTransitionReport_639289018884766773" order="4" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber_639289018884766773" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFileNumber_639289018884766773" order="5" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName_639289018884766773" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityRegistrantName_639289018884766773" order="6" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityIncorporationStateCountryCode_639289018884772214" order="7" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityTaxIdentificationNumber_639289018884772214" order="8" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressAddressLine1_639289018884772214" order="9" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressCityOrTown_639289018884772214" order="10" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressStateOrProvince_639289018884772214" order="11" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityAddressPostalZipCode_639289018884772214" order="12" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CityAreaCode_639289018884772214" order="13" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_LocalPhoneNumber_639289018884772214" order="14" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_Security12bTitle_639289018884772214" order="15" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_TradingSymbol_639289018884772214" order="16" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_SecurityExchangeName_639289018884772214" order="17" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCurrentReportingStatus_639289018884772214" order="18" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityInteractiveDataCurrent_639289018884772214" order="19" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityFilerCategory_639289018884772214" order="20" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntitySmallBusiness_639289018884772214" order="21" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityEmergingGrowthCompany_639289018884772214" order="22" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityShellCompany_639289018884772214" order="23" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCommonStockSharesOutstanding_639289018884772214" order="24" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_EntityCentralIndexKey_639289018884772214" order="25" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentFiscalYearFocus_639289018884772214" order="26" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentFiscalPeriodFocus_639289018884772214" order="27" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_CurrentFiscalYearEndDate_639289018884772214" order="28" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_AmendmentFlag_639289018884772214" order="29" use="optional" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/StatementCondensedConsolidatedBalanceSheets" xlink:type="extended" xlink:title="995200100 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_AssetsAbstract_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract_639289018884772214" xlink:to="us-gaap_AssetsCurrentAbstract_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract_639289018884772214" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract_639289018884772214" xlink:to="us-gaap_ShortTermInvestments_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract_639289018884772214" xlink:to="us-gaap_AccountsReceivableNetCurrent_639289018884772214" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract_639289018884772214" xlink:to="us-gaap_InventoryNet_639289018884772214" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract_639289018884772214" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_639289018884772214" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsCurrentAbstract_639289018884772214" xlink:to="us-gaap_AssetsCurrent_639289018884772214" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract_639289018884772214" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract_639289018884772214" xlink:to="us-gaap_Goodwill_639289018884772214" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract_639289018884772214" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill_639289018884772214" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract_639289018884772214" xlink:to="us-gaap_OtherAssetsNoncurrent_639289018884772214" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract_639289018884772214" xlink:to="us-gaap_Assets_639289018884772214" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" xlink:to="us-gaap_LongTermDebtCurrent_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" xlink:to="us-gaap_AccountsPayableCurrent_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" xlink:to="us-gaap_EmployeeRelatedLiabilitiesCurrent_639289018884772214" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ContractWithCustomerLiabilityCustomerDepositsAndPrepayments" xlink:label="osis_ContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" xlink:to="osis_ContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018884772214" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" xlink:to="us-gaap_ContractWithCustomerLiabilityCurrent_639289018884772214" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" xlink:to="us-gaap_OtherLiabilitiesCurrent_639289018884772214" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesCurrentAbstract_639289018884772214" xlink:to="us-gaap_LiabilitiesCurrent_639289018884772214" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_LongTermDebtNoncurrent_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_DeferredIncomeTaxLiabilitiesNet_639289018884772214" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_OtherLiabilitiesNoncurrent_639289018884772214" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_Liabilities_639289018884772214" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_CommitmentsAndContingencies_639289018884772214" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_StockholdersEquityAbstract_639289018884772214" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_PreferredStockValue_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_CommonStockValue_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_639289018884772214" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_639289018884772214" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_StockholdersEquity_639289018884772214" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract_639289018884772214" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_639289018884772214" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical" xlink:type="extended" xlink:title="995200105 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_PreferredStockSharesAuthorized_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_PreferredStockSharesIssued_639289018884772214" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_PreferredStockSharesOutstanding_639289018884772214" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_639289018884772214" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_CommonStockSharesAuthorized_639289018884772214" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_CommonStockSharesIssued_639289018884772214" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract_635524462238160416" xlink:to="us-gaap_CommonStockSharesOutstanding_639289018884772214" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfOperations" xlink:type="extended" xlink:title="995200200 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract_635524462238160416" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract_635524462238160416" xlink:to="us-gaap_StatementTable_639289018884772214" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis" xlink:label="srt_ProductOrServiceAxis_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable_639289018884772214" xlink:to="srt_ProductOrServiceAxis_639289018884772214" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain" xlink:label="srt_ProductsAndServicesDomain_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ProductOrServiceAxis_639289018884772214" xlink:to="srt_ProductsAndServicesDomain_639289018884772214" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProductMember" xlink:label="us-gaap_ProductMember_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ProductsAndServicesDomain_639289018884772214" xlink:to="us-gaap_ProductMember_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ServiceMember" xlink:label="us-gaap_ServiceMember_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ProductsAndServicesDomain_639289018884772214" xlink:to="us-gaap_ServiceMember_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable_639289018884772214" xlink:to="us-gaap_StatementLineItems_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_RevenuesAbstract_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesAbstract_639289018884772214" xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSoldAbstract" xlink:label="us-gaap_CostOfGoodsAndServicesSoldAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_CostOfGoodsAndServicesSoldAbstract_639289018884772214" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="us-gaap_CostOfGoodsAndServicesSold_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CostOfGoodsAndServicesSoldAbstract_639289018884772214" xlink:to="us-gaap_CostOfGoodsAndServicesSold_639289018884772214" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_GrossProfit_639289018884772214" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="us-gaap_OperatingExpensesAbstract_639289018884772214" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_OperatingExpensesAbstract_639289018884772214" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_639289018884837420" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingExpensesAbstract_639289018884772214" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense_639289018884837420" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingExpensesAbstract_639289018884772214" xlink:to="us-gaap_ResearchAndDevelopmentExpense_639289018884837838" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingExpensesAbstract_639289018884772214" xlink:to="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018884837838" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingExpensesAbstract_639289018884772214" xlink:to="us-gaap_OperatingExpenses_639289018884837838" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_OperatingIncomeLoss_639289018884837838" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating" xlink:label="us-gaap_InterestExpenseNonoperating_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_InterestExpenseNonoperating_639289018884837838" order="6" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_639289018884837838" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_IncomeTaxExpenseBenefit_639289018884837838" order="8" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="7" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_NetIncomeLoss_639289018884837838" order="9" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_EarningsPerShareAbstract_639289018884837838" order="10" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884837838" xlink:to="us-gaap_EarningsPerShareBasic_639289018884837838" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884837838" xlink:to="us-gaap_EarningsPerShareDiluted_639289018884837838" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_639289018884837838" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884772214" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_639289018884837838" order="11" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_639289018884837838" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_639289018884837838" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended" xlink:title="995200300 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_NetIncomeLoss_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_639289018884848143" xlink:to="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeOtherNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeOtherNetOfTax_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_639289018884848143" xlink:to="us-gaap_OtherComprehensiveIncomeOtherNetOfTax_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_639289018884848143" xlink:to="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_639289018884848143" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_639289018884848143" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfStockholdersEquity" xlink:type="extended" xlink:title="995200400 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_635524462238160416" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract_635524462238160416" xlink:to="us-gaap_StatementTable_639289018884848143" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable_639289018884848143" xlink:to="us-gaap_StatementEquityComponentsAxis_639289018884848143" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember" xlink:label="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementEquityComponentsAxis_639289018884848143" xlink:to="us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementEquityComponentsAxis_639289018884848143" xlink:to="us-gaap_RetainedEarningsMember_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementEquityComponentsAxis_639289018884848143" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_639289018884848143" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementEquityComponentsAxis_639289018884848143" xlink:to="us-gaap_EquityComponentDomain_639289018884848143" order="4" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable_639289018884848143" xlink:to="us-gaap_StatementLineItems_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_StockholdersEquity_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_SharesOutstanding_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_639289018884848143" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_639289018884848143" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_639289018884848143" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="9" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_639289018884848143" xlink:to="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_639289018884848143" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_639289018884848143" xlink:to="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_639289018884848143" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_639289018884848143" order="7" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_639289018884848143" xlink:to="us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_639289018884848143" order="8" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_639289018884848143" xlink:to="us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_NetIncomeLoss_639289018884848143" order="9" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_639289018884848143" order="10" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity_6392890188848481431" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_StockholdersEquity_6392890188848481431" order="11" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding_6392890188848481431" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_639289018884848143" xlink:to="us-gaap_SharesOutstanding_6392890188848481431" order="12" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="2" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/StatementCondensedConsolidatedStatementsOfCashFlows" xlink:type="extended" xlink:title="995200500 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_ProfitLoss_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="8" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_DepreciationDepletionAndAmortization_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_ShareBasedCompensation_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="us-gaap_ProvisionForDoubtfulAccounts_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_ProvisionForDoubtfulAccounts_639289018884848143" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="7" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_639289018884848143" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_AmortizationOfFinancingCostsAndDiscounts_639289018884848143" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="us-gaap_OtherNoncashIncomeExpense_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_OtherNoncashIncomeExpense_639289018884848143" order="6" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_639289018884848143" order="1" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInInventories_639289018884848143" order="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_639289018884848143" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_639289018884848143" order="3" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_IncreaseDecreaseInContractWithCustomerLiabilityCustomerDepositsAndPrepayments" xlink:label="osis_IncreaseDecreaseInContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="osis_IncreaseDecreaseInContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018884903448" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:label="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInContractWithCustomerLiability_639289018884903448" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_639289018884848143" xlink:to="us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_639289018884903448" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_639289018884848143" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireShortTermInvestments" xlink:label="us-gaap_PaymentsToAcquireShortTermInvestments_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_PaymentsToAcquireShortTermInvestments_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireOtherProductiveAssets" xlink:label="us-gaap_PaymentsToAcquireOtherProductiveAssets_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_PaymentsToAcquireOtherProductiveAssets_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_639289018884903448" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:label="us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_RepaymentsOfLongTermDebt_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:label="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities" xlink:label="us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock_639289018884903448" order="6" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_639289018884903448" order="7" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_639289018884903448" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_639289018884903448" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_639289018884903448" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6392890188849034481" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6392890188849034481" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_639289018884903448" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract_639289018884903448" xlink:to="us-gaap_InterestPaidNet_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="us-gaap_IncomeTaxesPaidNet_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract_639289018884903448" xlink:to="us-gaap_IncomeTaxesPaidNet_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentation" xlink:type="extended" xlink:title="995210101 - Disclosure - Basis of Presentation" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:label="us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBusinessCombinations" xlink:type="extended" xlink:title="995210201 - Disclosure - Business Combinations" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="us-gaap_BusinessCombinationsAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationsAbstract_1" xlink:to="us-gaap_BusinessCombinationDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBalanceSheetDetails" xlink:type="extended" xlink:title="995210301 - Disclosure - Balance Sheet Details" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_BalanceSheetDetailsDisclosureAbstract" xlink:label="osis_BalanceSheetDetailsDisclosureAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalBalanceSheetDisclosuresTextBlock" xlink:label="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_BalanceSheetDetailsDisclosureAbstract_1" xlink:to="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssets" xlink:type="extended" xlink:title="995210401 - Disclosure - Goodwill and Intangible Assets" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureContractAssetsAndLiabilities" xlink:type="extended" xlink:title="995210501 - Disclosure - Contract Assets and Liabilities" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueFromContractWithCustomerAbstract" xlink:to="us-gaap_RevenueFromContractWithCustomerTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureLeases" xlink:type="extended" xlink:title="995210601 - Disclosure - Leases" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract" xlink:label="us-gaap_LeasesAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeasesTextBlock" xlink:label="us-gaap_LesseeOperatingLeasesTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="us-gaap_LesseeOperatingLeasesTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="5" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherCharges" xlink:type="extended" xlink:title="995210701 - Disclosure - Restructuring and Other charges" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:to="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBorrowings" xlink:type="extended" xlink:title="995210801 - Disclosure - Borrowings" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="us-gaap_DebtDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract_1" xlink:to="us-gaap_DebtDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureStockholdersEquity" xlink:type="extended" xlink:title="995210901 - Disclosure - Stockholders' Equity" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:label="us-gaap_StockholdersEquityNoteAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingencies" xlink:type="extended" xlink:title="995211001 - Disclosure - Commitments and Contingencies" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureIncomeTaxes" xlink:type="extended" xlink:title="995211101 - Disclosure - Income Taxes" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureSegmentInformation" xlink:type="extended" xlink:title="995211201 - Disclosure - Segment Information" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract_1" xlink:to="us-gaap_SegmentReportingDisclosureTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationPolicies" xlink:type="extended" xlink:title="99920102 - Disclosure - Basis of Presentation (Policies)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_UseOfEstimates_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentPolicyTextBlock" xlink:label="us-gaap_InvestmentPolicyTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_InvestmentPolicyTextBlock_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_FairValueOfFinancialInstrumentsPolicy_639289018884903448" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="us-gaap_DerivativesPolicyTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_DerivativesPolicyTextBlock_639289018884903448" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_1" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_639289018884903448" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationTables" xlink:type="extended" xlink:title="99930103 - Disclosure - Basis of Presentation (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract_3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_3" xlink:to="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_3" xlink:to="us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_3" xlink:to="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfCashFlowHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock" xlink:label="us-gaap_ScheduleOfCashFlowHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_3" xlink:to="us-gaap_ScheduleOfCashFlowHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBalanceSheetDetailsTables" xlink:type="extended" xlink:title="99930303 - Disclosure - Balance Sheet Details (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_BalanceSheetDetailsDisclosureAbstract" xlink:label="osis_BalanceSheetDetailsDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfBalanceSheetAccountsTableTextBlock" xlink:label="osis_ScheduleOfBalanceSheetAccountsTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_BalanceSheetDetailsDisclosureAbstract" xlink:to="osis_ScheduleOfBalanceSheetAccountsTableTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsTables" xlink:type="extended" xlink:title="99930403 - Disclosure - Goodwill and Intangible Assets (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="us-gaap_ScheduleOfGoodwillTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1" xlink:to="us-gaap_ScheduleOfGoodwillTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock" xlink:label="osis_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1" xlink:to="osis_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTableTextBlock_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1" xlink:to="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureContractAssetsAndLiabilitiesTables" xlink:type="extended" xlink:title="99930503 - Disclosure - Contract Assets and Liabilities (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock" xlink:label="us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueFromContractWithCustomerAbstract" xlink:to="us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="3" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureLeasesTables" xlink:type="extended" xlink:title="99930603 - Disclosure - Leases (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract" xlink:label="us-gaap_LeasesAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCostTableTextBlock" xlink:label="us-gaap_LeaseCostTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="us-gaap_LeaseCostTableTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfSupplementalBalanceSheetAssetsAndLiabilitiesRelatedToOperatingLeasesTableTextBlock" xlink:label="osis_ScheduleOfSupplementalBalanceSheetAssetsAndLiabilitiesRelatedToOperatingLeasesTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="osis_ScheduleOfSupplementalBalanceSheetAssetsAndLiabilitiesRelatedToOperatingLeasesTableTextBlock_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfSupplementalCashFlowInformationForOperatingLeasesTableTextBlock" xlink:label="osis_ScheduleOfSupplementalCashFlowInformationForOperatingLeasesTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="osis_ScheduleOfSupplementalCashFlowInformationForOperatingLeasesTableTextBlock_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesTables" xlink:type="extended" xlink:title="99930703 - Disclosure - Restructuring and Other charges (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringAndRelatedActivitiesAbstract_1" xlink:to="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfImpairmentRestructuringAndRelatedCostsTableTextBlock" xlink:label="osis_ScheduleOfImpairmentRestructuringAndRelatedCostsTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringAndRelatedActivitiesAbstract_1" xlink:to="osis_ScheduleOfImpairmentRestructuringAndRelatedCostsTableTextBlock_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBorrowingsTables" xlink:type="extended" xlink:title="99930803 - Disclosure - Borrowings (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract_2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:label="us-gaap_ScheduleOfDebtInstrumentsTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract_2" xlink:to="us-gaap_ScheduleOfDebtInstrumentsTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract_2" xlink:to="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtTableTextBlock" xlink:label="us-gaap_ConvertibleDebtTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract_2" xlink:to="us-gaap_ConvertibleDebtTableTextBlock_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureStockholdersEquityTables" xlink:type="extended" xlink:title="99930903 - Disclosure - Stockholders' Equity (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:label="us-gaap_StockholdersEquityNoteAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingenciesTables" xlink:type="extended" xlink:title="99931003 - Disclosure - Commitments and Contingencies (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureSegmentInformationTables" xlink:type="extended" xlink:title="99931203 - Disclosure - Segment Information (Tables)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract_635524462238628425" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract_635524462238628425" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationDetails" xlink:type="extended" xlink:title="99940101 - Disclosure - Basis of Presentation (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract_4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_4" xlink:to="us-gaap_ShortTermInvestments_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationEarningsPerShareDetails" xlink:type="extended" xlink:title="99940102 - Disclosure - Basis of Presentation - Earnings Per Share (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract_636525622475115263" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_636525622475115263" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_639289018884903448" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_639289018884903448" xlink:to="us-gaap_DebtInstrumentAxis_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis_639289018884903448" xlink:to="us-gaap_DebtInstrumentNameDomain_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2029Member" xlink:label="osis_ConvertibleSeniorNotesDue2029Member_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain_639289018884903448" xlink:to="osis_ConvertibleSeniorNotesDue2029Member_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2031Member" xlink:label="osis_ConvertibleSeniorNotesDue2031Member_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain_639289018884903448" xlink:to="osis_ConvertibleSeniorNotesDue2031Member_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_639289018884903448" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_639289018884903448" xlink:to="us-gaap_EarningsPerShareAbstract_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_DebtInstrumentConvertibleConversionPrice1_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_639289018884903448" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities" xlink:label="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_639289018884903448" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_639289018884903448" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_EarningsPerShareBasic_639289018884903448" order="9" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_EarningsPerShareDiluted_639289018884903448" order="10" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EarningsPerShareAbstract_639289018884903448" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_639289018884903448" order="11" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationCashAndCashEquivalentsDetails" xlink:type="extended" xlink:title="99940103 - Disclosure - Basis of Presentation - Cash and Cash Equivalents (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract_2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAbstract" xlink:label="us-gaap_CashAndCashEquivalentsAbstract_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_2" xlink:to="us-gaap_CashAndCashEquivalentsAbstract_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CashAndCashEquivalentsAbstract_639289018884903448" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CashAndCashEquivalentsHeldByForeignSubsidiariesPercentage" xlink:label="osis_CashAndCashEquivalentsHeldByForeignSubsidiariesPercentage_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CashAndCashEquivalentsAbstract_639289018884903448" xlink:to="osis_CashAndCashEquivalentsHeldByForeignSubsidiariesPercentage_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationDebtSecuritiesAvailableForSaleDetails" xlink:type="extended" xlink:title="99940104 - Disclosure - Basis of Presentation - Debt Securities Available For Sale (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract_5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleTable_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_5" xlink:to="us-gaap_DebtSecuritiesAvailableForSaleTable_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtSecuritiesAvailableForSaleTable_639289018884903448" xlink:to="us-gaap_FinancialInstrumentAxis_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FinancialInstrumentAxis_639289018884903448" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="us-gaap_USTreasurySecuritiesMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_639289018884903448" xlink:to="us-gaap_USTreasurySecuritiesMember_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtSecuritiesAvailableForSaleTable_639289018884903448" xlink:to="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_639289018884903448" xlink:to="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_639289018884903448" xlink:to="us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_639289018884903448" xlink:to="us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_639289018884903448" xlink:to="us-gaap_AvailableForSaleSecuritiesDebtSecurities_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationFairValueOfFinancialInstrumentsDetails" xlink:type="extended" xlink:title="99940105 - Disclosure - Basis of Presentation - Fair Value of Financial Instruments (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_639289018884903448" order="1" use="optional" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_639289018884903448" xlink:to="us-gaap_FairValueByMeasurementFrequencyAxis_639289018884903448" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis_639289018884903448" xlink:to="us-gaap_FairValueMeasurementFrequencyDomain_639289018884903448" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain_639289018884903448" xlink:to="us-gaap_FairValueMeasurementsRecurringMember_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_639289018884903448" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_639289018884903448" order="2" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis_639289018884903448" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_639289018884903448" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_639289018884903448" xlink:to="us-gaap_FairValueInputsLevel2Member_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_639289018884903448" xlink:to="us-gaap_FairValueInputsLevel3Member_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_639289018884903448" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_InsuranceCompanyContractsFairValue" xlink:label="osis_InsuranceCompanyContractsFairValue_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_639289018884903448" xlink:to="osis_InsuranceCompanyContractsFairValue_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:label="us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_639289018884903448" xlink:to="us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_639289018884903448" xlink:to="us-gaap_ShortTermInvestments_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtFairValueDisclosures" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_639289018884903448" xlink:to="us-gaap_ConvertibleDebtFairValueDisclosures_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_639289018884903448" xlink:to="us-gaap_BusinessCombinationContingentConsiderationLiability_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBasisOfPresentationDerivativeInstrumentsAndHedgingActivityDetails" xlink:type="extended" xlink:title="99940106 - Disclosure - Basis of Presentation - Derivative Instruments and Hedging Activity (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract_637386955498157880" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract_637386955498157880" xlink:to="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_639289018884903448" order="1" use="optional" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_639289018884903448" xlink:to="us-gaap_DerivativeInstrumentRiskAxis_639289018884903448" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis_639289018884903448" xlink:to="us-gaap_DerivativeContractTypeDomain_639289018884903448" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain_639289018884903448" xlink:to="us-gaap_ForeignExchangeForwardMember_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CrossCurrencyInterestRateContractMember" xlink:label="us-gaap_CrossCurrencyInterestRateContractMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain_639289018884903448" xlink:to="us-gaap_CrossCurrencyInterestRateContractMember_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain_639289018884903448" xlink:to="us-gaap_InterestRateSwapMember_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis" xlink:label="us-gaap_HedgingDesignationAxis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_639289018884903448" xlink:to="us-gaap_HedgingDesignationAxis_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain" xlink:label="us-gaap_HedgingDesignationDomain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_HedgingDesignationAxis_639289018884903448" xlink:to="us-gaap_HedgingDesignationDomain_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember" xlink:label="us-gaap_NondesignatedMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_HedgingDesignationDomain_639289018884903448" xlink:to="us-gaap_NondesignatedMember_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="us-gaap_DesignatedAsHedgingInstrumentMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_HedgingDesignationDomain_639289018884903448" xlink:to="us-gaap_DesignatedAsHedgingInstrumentMember_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="us-gaap_DerivativeInstrumentsGainLossLineItems_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_639289018884903448" xlink:to="us-gaap_DerivativeInstrumentsGainLossLineItems_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount" xlink:label="us-gaap_DerivativeNotionalAmount_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems_639289018884903448" xlink:to="us-gaap_DerivativeNotionalAmount_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="us-gaap_DerivativeAssetNotionalAmount_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems_639289018884903448" xlink:to="us-gaap_DerivativeAssetNotionalAmount_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_InterestAndOtherExpenseNet" xlink:label="osis_InterestAndOtherExpenseNet_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems_639289018884903448" xlink:to="osis_InterestAndOtherExpenseNet_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems_639289018884903448" xlink:to="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ReclassificationOfAccumulatedOtherComprehensiveLossToInterestAndOtherExpenses" xlink:label="osis_ReclassificationOfAccumulatedOtherComprehensiveLossToInterestAndOtherExpenses_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems_639289018884903448" xlink:to="osis_ReclassificationOfAccumulatedOtherComprehensiveLossToInterestAndOtherExpenses_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBusinessCombinationsDetails" xlink:type="extended" xlink:title="99940201 - Disclosure - Business Combinations (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="us-gaap_BusinessCombinationsAbstract_3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfBusinessesAcquired" xlink:label="us-gaap_NumberOfBusinessesAcquired_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationsAbstract_3" xlink:to="us-gaap_NumberOfBusinessesAcquired_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBalanceSheetDetailsDetails" xlink:type="extended" xlink:title="99940301 - Disclosure - Balance Sheet Details (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_BalanceSheetDetailsDisclosureAbstract" xlink:label="osis_BalanceSheetDetailsDisclosureAbstract_637050881188356172" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_BalanceSheetDetailsDisclosureAbstract_637050881188356172" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_639289018884903448" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_639289018884903448" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_639289018884903448" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis_639289018884903448" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LandMember" xlink:label="us-gaap_LandMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_LandMember_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="us-gaap_BuildingAndBuildingImprovementsMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_BuildingAndBuildingImprovementsMember_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="us-gaap_LeaseholdImprovementsMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_LeaseholdImprovementsMember_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquipmentMember" xlink:label="us-gaap_EquipmentMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_EquipmentMember_639289018884903448" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComputerEquipmentMember" xlink:label="us-gaap_ComputerEquipmentMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_ComputerEquipmentMember_639289018884903448" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SoftwareInternallyDevelopedAndPurchasedMember" xlink:label="us-gaap_SoftwareInternallyDevelopedAndPurchasedMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_SoftwareInternallyDevelopedAndPurchasedMember_639289018884903448" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SoftwareInDevelopmentMember" xlink:label="us-gaap_SoftwareInDevelopmentMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_SoftwareInDevelopmentMember_639289018884903448" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConstructionInProgressMember" xlink:label="us-gaap_ConstructionInProgressMember_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain_639289018884903448" xlink:to="us-gaap_ConstructionInProgressMember_639289018884903448" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_639289018884903448" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrentAbstract" xlink:label="us-gaap_AccountsReceivableNetCurrentAbstract_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems_639289018884903448" xlink:to="us-gaap_AccountsReceivableNetCurrentAbstract_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableGrossCurrent" xlink:label="us-gaap_AccountsReceivableGrossCurrent_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsReceivableNetCurrentAbstract_639289018884903448" xlink:to="us-gaap_AccountsReceivableGrossCurrent_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsReceivableNetCurrentAbstract_639289018884903448" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsReceivableNetCurrentAbstract_639289018884903448" xlink:to="us-gaap_AccountsReceivableNetCurrent_639289018884903448" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="us-gaap_InventoryDisclosureAbstract_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems_639289018884903448" xlink:to="us-gaap_InventoryDisclosureAbstract_639289018884903448" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_639289018884903448" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InventoryDisclosureAbstract_639289018884903448" xlink:to="us-gaap_InventoryRawMaterialsNetOfReserves_639289018884903448" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InventoryDisclosureAbstract_639289018884903448" xlink:to="us-gaap_InventoryWorkInProcessNetOfReserves_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InventoryDisclosureAbstract_639289018884903448" xlink:to="us-gaap_InventoryFinishedGoodsNetOfReserves_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InventoryDisclosureAbstract_639289018884903448" xlink:to="us-gaap_InventoryNet_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:label="us-gaap_PropertyPlantAndEquipmentNetAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems_639289018884903448" xlink:to="us-gaap_PropertyPlantAndEquipmentNetAbstract_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentNetAbstract_639289018885060353" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentNetAbstract_639289018885060353" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentNetAbstract_639289018885060353" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation" xlink:label="us-gaap_Depreciation_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PropertyPlantAndEquipmentNetAbstract_639289018885060353" xlink:to="us-gaap_Depreciation_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsDetails" xlink:type="extended" xlink:title="99940401 - Disclosure - Goodwill and Intangible Assets (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_635524462238940431" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="us-gaap_ScheduleOfGoodwillTable_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_635524462238940431" xlink:to="us-gaap_ScheduleOfGoodwillTable_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitAxis" xlink:label="us-gaap_ReportingUnitAxis_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfGoodwillTable_639289018885060353" xlink:to="us-gaap_ReportingUnitAxis_639289018885060353" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitDomain" xlink:label="us-gaap_ReportingUnitDomain_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ReportingUnitAxis_639289018885060353" xlink:to="us-gaap_ReportingUnitDomain_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_SecurityDivisionMember" xlink:label="osis_SecurityDivisionMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ReportingUnitDomain_639289018885060353" xlink:to="osis_SecurityDivisionMember_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_OptoelectronicsAndManufacturingDivisionMember" xlink:label="osis_OptoelectronicsAndManufacturingDivisionMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ReportingUnitDomain_639289018885060353" xlink:to="osis_OptoelectronicsAndManufacturingDivisionMember_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_HealthcareDivisionMember" xlink:label="osis_HealthcareDivisionMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ReportingUnitDomain_639289018885060353" xlink:to="osis_HealthcareDivisionMember_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillLineItems" xlink:label="us-gaap_GoodwillLineItems_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfGoodwillTable_639289018885060353" xlink:to="us-gaap_GoodwillLineItems_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillRollForward" xlink:label="us-gaap_GoodwillRollForward_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillLineItems_639289018885060353" xlink:to="us-gaap_GoodwillRollForward_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillRollForward_639289018885060353" xlink:to="us-gaap_Goodwill_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="us-gaap_GoodwillPurchaseAccountingAdjustments_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillRollForward_639289018885060353" xlink:to="us-gaap_GoodwillPurchaseAccountingAdjustments_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss" xlink:label="us-gaap_GoodwillForeignCurrencyTranslationGainLoss_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillRollForward_639289018885060353" xlink:to="us-gaap_GoodwillForeignCurrencyTranslationGainLoss_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill_6392890188850603531" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillRollForward_639289018885060353" xlink:to="us-gaap_Goodwill_6392890188850603531" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsIntangibleAssetsSubjectToAmortizationDetails" xlink:type="extended" xlink:title="99940402 - Disclosure - Goodwill and Intangible Assets - Intangible assets subject to amortization (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_636118682560067046" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_636118682560067046" xlink:to="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember" xlink:label="us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" xlink:to="us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PatentsMember" xlink:label="us-gaap_PatentsMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" xlink:to="us-gaap_PatentsMember_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="us-gaap_DevelopedTechnologyRightsMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" xlink:to="us-gaap_DevelopedTechnologyRightsMember_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CustomerRelationshipsOrderOrProductionBacklogMember" xlink:label="osis_CustomerRelationshipsOrderOrProductionBacklogMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" xlink:to="osis_CustomerRelationshipsOrderOrProductionBacklogMember_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" order="2" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TrademarksMember" xlink:label="us-gaap_TrademarksMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" xlink:to="us-gaap_TrademarksMember_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems" xlink:label="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" xlink:to="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillAbstract_639289018885060353" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsGrossExcludingGoodwill_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_639289018885060353" xlink:to="us-gaap_IntangibleAssetsGrossExcludingGoodwill_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_639289018885060353" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="us-gaap_AmortizationOfIntangibleAssets_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" xlink:to="us-gaap_AmortizationOfIntangibleAssets_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureGoodwillAndIntangibleAssetsEstimatedFutureAmortizationExpenseDetails" xlink:type="extended" xlink:title="99940403 - Disclosure - Goodwill and Intangible Assets - Estimated future amortization expense (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_635524462238940431" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" xlink:label="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_635524462238940431" xlink:to="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember" xlink:label="us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_639289018885060353" xlink:to="us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems" xlink:label="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_639289018885060353" xlink:to="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_639289018885060353" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_FiniteLivedIntangiblesAssetExpectedAmortizationAfterYearFour" xlink:label="osis_FiniteLivedIntangiblesAssetExpectedAmortizationAfterYearFour_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" xlink:to="osis_FiniteLivedIntangiblesAssetExpectedAmortizationAfterYearFour_639289018885060353" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_639289018885060353" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet_639289018885060353" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedComputerSoftwareAdditions" xlink:label="us-gaap_CapitalizedComputerSoftwareAdditions_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_639289018885060353" xlink:to="us-gaap_CapitalizedComputerSoftwareAdditions_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureContractAssetsAndLiabilitiesDetails" xlink:type="extended" xlink:title="99940501 - Disclosure - Contract Assets and Liabilities (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="us-gaap_RevenueFromContractWithCustomerAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueFromContractWithCustomerAbstract" xlink:to="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_639289018885060353" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_639289018885060353" xlink:to="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_639289018885060353" order="1" use="optional" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_639289018885060353" xlink:to="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ChangeInContractWithCustomerAssetAbstract" xlink:label="us-gaap_ChangeInContractWithCustomerAssetAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_639289018885060353" xlink:to="us-gaap_ChangeInContractWithCustomerAssetAbstract_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNet" xlink:label="us-gaap_ContractWithCustomerAssetNet_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ChangeInContractWithCustomerAssetAbstract_639289018885060353" xlink:to="us-gaap_ContractWithCustomerAssetNet_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ContractWithCustomerAssetAmountOfChange" xlink:label="osis_ContractWithCustomerAssetAmountOfChange_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ChangeInContractWithCustomerAssetAbstract_639289018885060353" xlink:to="osis_ContractWithCustomerAssetAmountOfChange_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ContractWithCustomerAssetPercentageOfChange" xlink:label="osis_ContractWithCustomerAssetPercentageOfChange_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ChangeInContractWithCustomerAssetAbstract_639289018885060353" xlink:to="osis_ContractWithCustomerAssetPercentageOfChange_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityAbstract" xlink:label="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_639289018885060353" xlink:to="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ContractWithCustomerLiabilityCustomerDepositsAndPrepayments" xlink:label="osis_ContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="osis_ContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="us-gaap_ContractWithCustomerLiabilityCurrent_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="us-gaap_ContractWithCustomerLiabilityNoncurrent_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_IncreaseDecreaseContractWithCustomerLiabilityCustomerDepositsAndPrepayments" xlink:label="osis_IncreaseDecreaseContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="osis_IncreaseDecreaseContractWithCustomerLiabilityCustomerDepositsAndPrepayments_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ContractWithCustomerLiabilityPercentageOfChangeCustomerDepositsAndPrepayments" xlink:label="osis_ContractWithCustomerLiabilityPercentageOfChangeCustomerDepositsAndPrepayments_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="osis_ContractWithCustomerLiabilityPercentageOfChangeCustomerDepositsAndPrepayments_639289018885060353" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_IncreaseDecreaseInDeferredRevenueCurrent" xlink:label="osis_IncreaseDecreaseInDeferredRevenueCurrent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="osis_IncreaseDecreaseInDeferredRevenueCurrent_639289018885060353" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_IncreaseDecreaseInDeferredRevenueNoncurrent" xlink:label="osis_IncreaseDecreaseInDeferredRevenueNoncurrent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="osis_IncreaseDecreaseInDeferredRevenueNoncurrent_639289018885060353" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ContractWithCustomerLiabilityPercentageOfChangeDeferredRevenueNonCurrent" xlink:label="osis_ContractWithCustomerLiabilityPercentageOfChangeDeferredRevenueNonCurrent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="osis_ContractWithCustomerLiabilityPercentageOfChangeDeferredRevenueNonCurrent_639289018885060353" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ContractWithCustomerLiabilityAbstract_639289018885060353" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenue_639289018885060353" order="9" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuePerformanceObligationAbstract" xlink:label="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_639289018885060353" xlink:to="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation" xlink:label="us-gaap_RevenueRemainingPerformanceObligation_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" xlink:to="us-gaap_RevenueRemainingPerformanceObligation_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="9" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_RevenueRemainingPerformanceObligationExpectedTimingPercentage" xlink:label="osis_RevenueRemainingPerformanceObligationExpectedTimingPercentage_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" xlink:to="osis_RevenueRemainingPerformanceObligationExpectedTimingPercentage_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:label="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" xlink:to="us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_RevenueRecognizedFromContractLiabilities" xlink:label="osis_RevenueRecognizedFromContractLiabilities_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" xlink:to="osis_RevenueRecognizedFromContractLiabilities_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuePracticalExpedientIncrementalCostOfObtainingContract" xlink:label="us-gaap_RevenuePracticalExpedientIncrementalCostOfObtainingContract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" xlink:to="us-gaap_RevenuePracticalExpedientIncrementalCostOfObtainingContract_639289018885060353" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuePracticalExpedientFinancingComponent" xlink:label="us-gaap_RevenuePracticalExpedientFinancingComponent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuePerformanceObligationAbstract_639289018885060353" xlink:to="us-gaap_RevenuePracticalExpedientFinancingComponent_639289018885060353" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureLeasesDetails" xlink:type="extended" xlink:title="99940601 - Disclosure - Leases (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract" xlink:label="us-gaap_LeasesAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCostAbstract" xlink:label="us-gaap_LeaseCostAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="us-gaap_LeaseCostAbstract_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseCost" xlink:label="us-gaap_OperatingLeaseCost_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeaseCostAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeaseCost_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableLeaseCost" xlink:label="us-gaap_VariableLeaseCost_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeaseCostAbstract_639289018885060353" xlink:to="us-gaap_VariableLeaseCost_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermLeaseCost" xlink:label="us-gaap_ShortTermLeaseCost_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeaseCostAbstract_639289018885060353" xlink:to="us-gaap_ShortTermLeaseCost_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCost" xlink:label="us-gaap_LeaseCost_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeaseCostAbstract_639289018885060353" xlink:to="us-gaap_LeaseCost_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:label="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset_639289018885060353" xlink:to="us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:label="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilityCurrent_639289018885060353" xlink:to="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilityNoncurrent_639289018885060353" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability" xlink:label="us-gaap_OperatingLeaseLiability_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeaseLiability_639289018885060353" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_639289018885060353" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_639289018885060353" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" xlink:label="osis_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract" xlink:to="osis_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract_639289018885060353" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasePayments" xlink:label="us-gaap_OperatingLeasePayments_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract_639289018885060353" xlink:to="us-gaap_OperatingLeasePayments_639289018885060353" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_639289018885060353" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract_639289018885060353" xlink:to="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_639289018885060353" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureLeasesMaturitiesOfOperatingLeaseLiabilitiesDetails" xlink:type="extended" xlink:title="99940602 - Disclosure - Leases - Maturities of operating lease liabilities (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAbstract" xlink:label="us-gaap_LeasesAbstract_637647116259168821" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LeasesAbstract_637647116259168821" xlink:to="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive_639289018885216602" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive_639289018885216602" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_639289018885216602" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_639289018885216602" order="8" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="9" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability" xlink:label="us-gaap_OperatingLeaseLiability_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueRollingMaturityAbstract_639289018885216602" xlink:to="us-gaap_OperatingLeaseLiability_639289018885216602" order="9" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="4" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesDetails" xlink:type="extended" xlink:title="99940701 - Disclosure - Restructuring and Other charges (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_2" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable" xlink:label="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringAndRelatedActivitiesAbstract_2" xlink:to="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="us-gaap_StatementBusinessSegmentsAxis_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementBusinessSegmentsAxis_639289018885216602" xlink:to="us-gaap_SegmentDomain_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_SecurityDivisionMember" xlink:label="osis_SecurityDivisionMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain_639289018885216602" xlink:to="osis_SecurityDivisionMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_HealthcareDivisionMember" xlink:label="osis_HealthcareDivisionMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain_639289018885216602" xlink:to="osis_HealthcareDivisionMember_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringPlanAxis" xlink:label="us-gaap_RestructuringPlanAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="us-gaap_RestructuringPlanAxis_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringPlanDomain" xlink:label="us-gaap_RestructuringPlanDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringPlanAxis_639289018885216602" xlink:to="us-gaap_RestructuringPlanDomain_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_OtherOperationalEfficiencyActivitiesMember" xlink:label="osis_OtherOperationalEfficiencyActivitiesMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringPlanDomain_639289018885216602" xlink:to="osis_OtherOperationalEfficiencyActivitiesMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ImpairmentRestructuringAndOtherChargesLineItems" xlink:label="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="us-gaap_BusinessCombinationAcquisitionRelatedCosts_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_BusinessCombinationAcquisitionRelatedCosts_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeveranceCosts1" xlink:label="us-gaap_SeveranceCosts1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_SeveranceCosts1_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessExitCosts1" xlink:label="us-gaap_BusinessExitCosts1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_BusinessExitCosts1_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LegalFees" xlink:label="us-gaap_LegalFees_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_LegalFees_639289018885216602" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonrecurringExpense" xlink:label="us-gaap_OtherNonrecurringExpense_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_OtherNonrecurringExpense_639289018885216602" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesScheduleDetails" xlink:type="extended" xlink:title="99940702 - Disclosure - Restructuring and Other charges - Schedule (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_3" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable" xlink:label="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringAndRelatedActivitiesAbstract_3" xlink:to="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="us-gaap_StatementBusinessSegmentsAxis_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementBusinessSegmentsAxis_639289018885216602" xlink:to="us-gaap_SegmentDomain_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_SecurityDivisionMember" xlink:label="osis_SecurityDivisionMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain_639289018885216602" xlink:to="osis_SecurityDivisionMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_OptoelectronicsAndManufacturingDivisionMember" xlink:label="osis_OptoelectronicsAndManufacturingDivisionMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain_639289018885216602" xlink:to="osis_OptoelectronicsAndManufacturingDivisionMember_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_HealthcareDivisionMember" xlink:label="osis_HealthcareDivisionMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain_639289018885216602" xlink:to="osis_HealthcareDivisionMember_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis" xlink:label="srt_ConsolidationItemsAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="srt_ConsolidationItemsAxis_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain" xlink:label="srt_ConsolidationItemsDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ConsolidationItemsAxis_639289018885216602" xlink:to="srt_ConsolidationItemsDomain_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember" xlink:label="us-gaap_OperatingSegmentsMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ConsolidationItemsDomain_639289018885216602" xlink:to="us-gaap_OperatingSegmentsMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="us-gaap_CorporateNonSegmentMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ConsolidationItemsDomain_639289018885216602" xlink:to="us-gaap_CorporateNonSegmentMember_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ImpairmentRestructuringAndOtherChargesLineItems" xlink:label="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="us-gaap_BusinessCombinationAcquisitionRelatedCosts_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_BusinessCombinationAcquisitionRelatedCosts_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeveranceCosts1" xlink:label="us-gaap_SeveranceCosts1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_SeveranceCosts1_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherRestructuringCosts" xlink:label="us-gaap_OtherRestructuringCosts_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_OtherRestructuringCosts_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessExitCosts1" xlink:label="us-gaap_BusinessExitCosts1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_BusinessExitCosts1_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_LegalAndOtherExpenseBenefitNet" xlink:label="osis_LegalAndOtherExpenseBenefitNet_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="osis_LegalAndOtherExpenseBenefitNet_639289018885216602" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018885216602" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureRestructuringAndOtherChargesAccruedLiabilityForRestructuringAndOtherChargesDetails" xlink:type="extended" xlink:title="99940703 - Disclosure - Restructuring and Other charges - Accrued liability for restructuring and other charges (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringAndRelatedActivitiesAbstract" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_4" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable" xlink:label="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringAndRelatedActivitiesAbstract_4" xlink:to="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="us-gaap_RestructuringCostAndReserveAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="us-gaap_RestructuringCostAndReserveAxis_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="us-gaap_TypeOfRestructuringDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringCostAndReserveAxis_639289018885216602" xlink:to="us-gaap_TypeOfRestructuringDomain_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AcquisitionRelatedCostsMember" xlink:label="us-gaap_AcquisitionRelatedCostsMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TypeOfRestructuringDomain_639289018885216602" xlink:to="us-gaap_AcquisitionRelatedCostsMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="us-gaap_EmployeeSeveranceMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TypeOfRestructuringDomain_639289018885216602" xlink:to="us-gaap_EmployeeSeveranceMember_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FacilityClosingMember" xlink:label="us-gaap_FacilityClosingMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TypeOfRestructuringDomain_639289018885216602" xlink:to="us-gaap_FacilityClosingMember_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ChargesRelatedToLitigationMember" xlink:label="osis_ChargesRelatedToLitigationMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TypeOfRestructuringDomain_639289018885216602" xlink:to="osis_ChargesRelatedToLitigationMember_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ImpairmentRestructuringAndOtherChargesLineItems" xlink:label="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ScheduleOfImpairmentRestructuringAndOtherChargesTable_639289018885216602" xlink:to="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="us-gaap_RestructuringReserveRollForward_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ImpairmentRestructuringAndOtherChargesLineItems_639289018885216602" xlink:to="us-gaap_RestructuringReserveRollForward_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringReserve" xlink:label="us-gaap_RestructuringReserve_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringReserveRollForward_639289018885216602" xlink:to="us-gaap_RestructuringReserve_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_RestructuringAndOtherChargesBenefitNet" xlink:label="osis_RestructuringAndOtherChargesBenefitNet_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringReserveRollForward_639289018885216602" xlink:to="osis_RestructuringAndOtherChargesBenefitNet_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_PaymentsForRestructuringNetReimbursement" xlink:label="osis_PaymentsForRestructuringNetReimbursement_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringReserveRollForward_639289018885216602" xlink:to="osis_PaymentsForRestructuringNetReimbursement_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringReserve" xlink:label="us-gaap_RestructuringReserve_6392890188852166021" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestructuringReserveRollForward_639289018885216602" xlink:to="us-gaap_RestructuringReserve_6392890188852166021" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" priority="4" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBorrowingsOtherBorrowingsDetails" xlink:type="extended" xlink:title="99940801 - Disclosure - Borrowings - Other borrowings (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable_639289018885216602" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="us-gaap_LongtermDebtTypeAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_LongtermDebtTypeAxis_639289018885216602" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="us-gaap_LongtermDebtTypeDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeAxis_639289018885216602" xlink:to="us-gaap_LongtermDebtTypeDomain_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2029Member" xlink:label="osis_ConvertibleSeniorNotesDue2029Member_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeDomain_639289018885216602" xlink:to="osis_ConvertibleSeniorNotesDue2029Member_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2031Member" xlink:label="osis_ConvertibleSeniorNotesDue2031Member_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeDomain_639289018885216602" xlink:to="osis_ConvertibleSeniorNotesDue2031Member_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_DebtInstrumentLineItems_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtCurrentAndNoncurrentAbstract" xlink:label="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermLineOfCredit" xlink:label="us-gaap_LongTermLineOfCredit_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" xlink:to="us-gaap_LongTermLineOfCredit_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebt" xlink:label="us-gaap_ConvertibleDebt_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" xlink:to="us-gaap_ConvertibleDebt_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="5" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermDebt" xlink:label="us-gaap_OtherLongTermDebt_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" xlink:to="us-gaap_OtherLongTermDebt_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="us-gaap_DebtLongtermAndShorttermCombinedAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" xlink:to="us-gaap_DebtLongtermAndShorttermCombinedAmount_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebtCurrent_639289018885216602" order="5" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="8" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtCurrentAndNoncurrentAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebtNoncurrent_639289018885216602" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="6" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtByMaturityAbstract" xlink:label="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" order="2" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_639289018885216602" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_DebtInstrumentCarryingAmount_639289018885216602" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_639289018885216602" order="7" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongTermDebtByMaturityAbstract_639289018885216602" xlink:to="us-gaap_LongTermDebt_639289018885216602" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="4" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBorrowingsRevolvingCreditFacilityDetails" xlink:type="extended" xlink:title="99940802 - Disclosure - Borrowings - Revolving Credit Facility (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="us-gaap_LongtermDebtTypeAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_LongtermDebtTypeAxis_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="us-gaap_LongtermDebtTypeDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeAxis_639289018885216602" xlink:to="us-gaap_LongtermDebtTypeDomain_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="us-gaap_RevolvingCreditFacilityMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeDomain_639289018885216602" xlink:to="us-gaap_RevolvingCreditFacilityMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_LettersOfCreditSubFacilityMember" xlink:label="osis_LettersOfCreditSubFacilityMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevolvingCreditFacilityMember_639289018885216602" xlink:to="osis_LettersOfCreditSubFacilityMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_TermLoanMember" xlink:label="osis_TermLoanMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeDomain_639289018885216602" xlink:to="osis_TermLoanMember_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="srt_RangeAxis_639289018885216602" order="2" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember" xlink:label="srt_RangeMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeAxis_639289018885216602" xlink:to="srt_RangeMember_639289018885216602" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember_639289018885216602" xlink:to="srt_MinimumMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember_639289018885216602" xlink:to="srt_MaximumMember_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_DebtInstrumentAxis_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis_639289018885216602" xlink:to="us-gaap_DebtInstrumentNameDomain_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_BorrowingsInForeignCurrenciesMember" xlink:label="osis_BorrowingsInForeignCurrenciesMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain_639289018885216602" xlink:to="osis_BorrowingsInForeignCurrenciesMember_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_DebtInstrumentLineItems_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity" xlink:label="osis_LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="osis_LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_SecuritizationOfQualifyingAssetsMaximumAmount" xlink:label="osis_SecuritizationOfQualifyingAssetsMaximumAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="osis_SecuritizationOfQualifyingAssetsMaximumAmount_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_639289018885216602" xlink:to="us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_639289018885216602" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LineOfCredit_639289018885216602" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LettersOfCreditOutstandingAmount_639289018885216602" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_639289018885216602" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBorrowingsConvertibleSeniorNotesDue2029And2031Details" xlink:type="extended" xlink:title="99940803 - Disclosure - Borrowings - Convertible Senior Notes Due 2029 and 2031 (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract_3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract_3" xlink:to="us-gaap_DebtInstrumentTable_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="us-gaap_LongtermDebtTypeAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_LongtermDebtTypeAxis_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="us-gaap_LongtermDebtTypeDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeAxis_639289018885216602" xlink:to="us-gaap_LongtermDebtTypeDomain_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2029Member" xlink:label="osis_ConvertibleSeniorNotesDue2029Member_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeDomain_639289018885216602" xlink:to="osis_ConvertibleSeniorNotesDue2029Member_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2031Member" xlink:label="osis_ConvertibleSeniorNotesDue2031Member_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeDomain_639289018885216602" xlink:to="osis_ConvertibleSeniorNotesDue2031Member_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember" xlink:label="us-gaap_LineOfCreditMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LongtermDebtTypeDomain_639289018885216602" xlink:to="us-gaap_LineOfCreditMember_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_DebtInstrumentAxis_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis_639289018885216602" xlink:to="us-gaap_DebtInstrumentNameDomain_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2029Member" xlink:label="osis_ConvertibleSeniorNotesDue2029Member_6392890188852166021" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain_639289018885216602" xlink:to="osis_ConvertibleSeniorNotesDue2029Member_6392890188852166021" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="srt_StatementScenarioAxis_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_StatementScenarioAxis_639289018885216602" xlink:to="srt_ScenarioUnspecifiedDomain_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CalendarQuarterCommencingAfterQuarterEndedOnSeptember302025Member" xlink:label="osis_CalendarQuarterCommencingAfterQuarterEndedOnSeptember302025Member_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain_639289018885216602" xlink:to="osis_CalendarQuarterCommencingAfterQuarterEndedOnSeptember302025Member_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_FiveConsecutiveBusinessDaysAfterSpecifiedPeriodMember" xlink:label="osis_FiveConsecutiveBusinessDaysAfterSpecifiedPeriodMember_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain_639289018885216602" xlink:to="osis_FiveConsecutiveBusinessDaysAfterSpecifiedPeriodMember_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable_639289018885216602" xlink:to="us-gaap_DebtInstrumentLineItems_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentFaceAmount_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_DebtInstrumentIssuancePricePercentageOfPrincipalAmount" xlink:label="osis_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="osis_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_639289018885216602" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_639289018885216602" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1" xlink:label="us-gaap_DebtInstrumentConvertibleConversionRatio1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentConvertibleConversionRatio1_639289018885216602" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentConvertibleConversionPrice1_639289018885216602" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_DebtInstrumentDefaultSettlementAmount" xlink:label="osis_DebtInstrumentDefaultSettlementAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="osis_DebtInstrumentDefaultSettlementAmount_639289018885216602" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_639289018885216602" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_639289018885216602" order="9" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentage_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentRedemptionPricePercentage_639289018885216602" order="10" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:label="us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_639289018885216602" order="11" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdTradingDays_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_DebtInstrumentConvertibleThresholdTradingDays_639289018885216602" order="12" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_InterestExpenseDebt_639289018885216602" order="13" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebtExcludingAmortization" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_InterestExpenseDebtExcludingAmortization_639289018885216602" order="14" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_AmortizationOfFinancingCostsAndDiscounts_639289018885216602" order="15" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LettersOfCreditOutstandingAmount_639289018885216602" order="16" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems_639289018885216602" xlink:to="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_639289018885216602" order="17" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureBorrowingsNotes2029And2031Details" xlink:type="extended" xlink:title="99940804 - Disclosure - Borrowings - Notes 2029 and 2031 (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract_4" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:label="us-gaap_ScheduleOfShortTermDebtTable_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract_4" xlink:to="us-gaap_ScheduleOfShortTermDebtTable_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShortTermDebtTable_639289018885216602" xlink:to="us-gaap_DebtInstrumentAxis_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis_639289018885216602" xlink:to="us-gaap_DebtInstrumentNameDomain_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2029Member" xlink:label="osis_ConvertibleSeniorNotesDue2029Member_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain_639289018885216602" xlink:to="osis_ConvertibleSeniorNotesDue2029Member_639289018885216602" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConvertibleSeniorNotesDue2031Member" xlink:label="osis_ConvertibleSeniorNotesDue2031Member_639289018885216602" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain_639289018885216602" xlink:to="osis_ConvertibleSeniorNotesDue2031Member_639289018885216602" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="us-gaap_ShortTermDebtLineItems_639289018885367367" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShortTermDebtTable_639289018885216602" xlink:to="us-gaap_ShortTermDebtLineItems_639289018885367367" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount_639289018885367367" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems_639289018885367367" xlink:to="us-gaap_DebtInstrumentFaceAmount_639289018885367367" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="us-gaap_DeferredFinanceCostsGross_639289018885367367" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems_639289018885367367" xlink:to="us-gaap_DeferredFinanceCostsGross_639289018885367367" order="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebt" xlink:label="us-gaap_ConvertibleDebt_639289018885367367" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems_639289018885367367" xlink:to="us-gaap_ConvertibleDebt_639289018885367367" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtFairValueDisclosures" xlink:label="us-gaap_ConvertibleDebtFairValueDisclosures_639289018885367367" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems_639289018885367367" xlink:to="us-gaap_ConvertibleDebtFairValueDisclosures_639289018885367367" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureStockholdersEquityStockBasedCompensationDetails" xlink:type="extended" xlink:title="99940901 - Disclosure - Stockholders' Equity - Stock-based Compensation (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:label="us-gaap_StockholdersEquityNoteAbstract_636117702015832789" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityNoteAbstract_636117702015832789" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis" xlink:label="us-gaap_StatementOfIncomeLocationBalanceAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_StatementOfIncomeLocationBalanceAxis_639289018885372482" order="1" use="optional" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_AwardTypeAxis_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardTypeAxis_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" xlink:to="us-gaap_EmployeeStockOptionMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" xlink:to="us-gaap_RestrictedStockUnitsRSUMember_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_PlanNameAxis_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PlanNameAxis_639289018885372482" xlink:to="us-gaap_PlanNameDomain_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareBasedEmployeeCompensationPlansMember" xlink:label="osis_ShareBasedEmployeeCompensationPlansMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PlanNameDomain_639289018885372482" xlink:to="osis_ShareBasedEmployeeCompensationPlansMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureStockholdersEquityOsiPlansDetails" xlink:type="extended" xlink:title="99940902 - Disclosure - Stockholders' Equity - OSI Plans (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:label="us-gaap_StockholdersEquityNoteAbstract_1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityNoteAbstract_1" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_PlanNameAxis_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PlanNameAxis_639289018885372482" xlink:to="us-gaap_PlanNameDomain_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareBasedEmployeeCompensationPlansMember" xlink:label="osis_ShareBasedEmployeeCompensationPlansMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_PlanNameDomain_639289018885372482" xlink:to="osis_ShareBasedEmployeeCompensationPlansMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_AwardTypeAxis_639289018885372482" order="2" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardTypeAxis_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" xlink:to="us-gaap_EmployeeStockOptionMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" xlink:to="us-gaap_RestrictedStockUnitsRSUMember_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_PerformanceBasedRestrictedStockUnitsMember" xlink:label="osis_PerformanceBasedRestrictedStockUnitsMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_639289018885372482" xlink:to="osis_PerformanceBasedRestrictedStockUnitsMember_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="srt_RangeAxis_639289018885372482" order="3" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember" xlink:label="srt_RangeMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeAxis_639289018885372482" xlink:to="srt_RangeMember_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember_639289018885372482" xlink:to="srt_MinimumMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember_639289018885372482" xlink:to="srt_MaximumMember_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_639289018885372482" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_6392890188853724821" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_6392890188853724821" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_639289018885372482" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_6392890188853724821" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_6392890188853724821" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_639289018885372482" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageRemainingContractualTermAbstract" xlink:label="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageRemainingContractualTermAbstract_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageRemainingContractualTermAbstract_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageRemainingContractualTermAbstract_639289018885372482" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageRemainingContractualTermAbstract_639289018885372482" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" xlink:label="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_639289018885372482" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_639289018885372482" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_639289018885372482" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_639289018885372482" order="4" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6392890188853724821" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6392890188853724821" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_639289018885372482" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_639289018885372482" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_6392890188853724821" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_6392890188853724821" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_639289018885372482" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantReducedForEachAwardGranted" xlink:label="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantReducedForEachAwardGranted_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantReducedForEachAwardGranted_639289018885372482" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreasedForEachAwardForfeitedAndReturned" xlink:label="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreasedForEachAwardForfeitedAndReturned_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreasedForEachAwardForfeitedAndReturned_639289018885372482" order="9" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageOnOriginalNumberOfSharesOrUnitsAwarded" xlink:label="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageOnOriginalNumberOfSharesOrUnitsAwarded_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="osis_ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutPercentageOnOriginalNumberOfSharesOrUnitsAwarded_639289018885372482" order="10" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureStockholdersEquityStockRepurchaseProgramDetails" xlink:type="extended" xlink:title="99940903 - Disclosure - Stockholders' Equity - Stock Repurchase Program (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:label="us-gaap_StockholdersEquityNoteAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_StatementEquityComponentsAxis_639289018885372482" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementEquityComponentsAxis_639289018885372482" xlink:to="us-gaap_EquityComponentDomain_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityComponentDomain_639289018885372482" xlink:to="us-gaap_CommonStockMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_639289018885372482" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramAbstract" xlink:label="srt_ShareRepurchaseProgramAbstract_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_639289018885372482" xlink:to="srt_ShareRepurchaseProgramAbstract_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ShareRepurchaseProgramAuthorizedAdditionalNumberOfShares" xlink:label="osis_ShareRepurchaseProgramAuthorizedAdditionalNumberOfShares_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramAbstract_639289018885372482" xlink:to="osis_ShareRepurchaseProgramAuthorizedAdditionalNumberOfShares_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramAbstract_639289018885372482" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased" xlink:label="us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramAbstract_639289018885372482" xlink:to="us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingenciesContingentAcquisitionObligationsDetails" xlink:type="extended" xlink:title="99941001 - Disclosure - Commitments and Contingencies - Contingent Acquisition Obligations (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="CommitmentsAndContingenciesDisclosureAbstract" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CommitmentsAndContingenciesDisclosureTable" xlink:label="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CommitmentsAndContingenciesDisclosureAbstract" xlink:to="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="us-gaap_BusinessAcquisitionAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" xlink:to="us-gaap_BusinessAcquisitionAxis_639289018885372482" order="1" use="optional" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessAcquisitionAxis_639289018885372482" xlink:to="us-gaap_BusinessAcquisitionAcquireeDomain_639289018885372482" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember" xlink:label="us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessAcquisitionAcquireeDomain_639289018885372482" xlink:to="us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CommitmentsAndContingenciesLineItems" xlink:label="osis_CommitmentsAndContingenciesLineItems_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" xlink:to="osis_CommitmentsAndContingenciesLineItems_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesLineItems_639289018885372482" xlink:to="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" xlink:to="us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" xlink:to="us-gaap_BusinessCombinationContingentConsiderationLiability_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_BusinessCombinationIncreaseDecreaseInForeignCurrencyTranslation" xlink:label="osis_BusinessCombinationIncreaseDecreaseInForeignCurrencyTranslation_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" xlink:to="osis_BusinessCombinationIncreaseDecreaseInForeignCurrencyTranslation_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" xlink:to="us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_639289018885372482" order="4" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_BusinessCombinationContingentConsiderationLiabilityPayment" xlink:label="osis_BusinessCombinationContingentConsiderationLiabilityPayment_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" xlink:to="osis_BusinessCombinationContingentConsiderationLiabilityPayment_639289018885372482" order="5" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="us-gaap_BusinessCombinationContingentConsiderationLiability_6392890188853724821" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BusinessCombinationContingentConsiderationArrangementsAbstract_639289018885372482" xlink:to="us-gaap_BusinessCombinationContingentConsiderationLiability_6392890188853724821" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureCommitmentsAndContingenciesGuaranteesDetails" xlink:type="extended" xlink:title="99941002 - Disclosure - Commitments and Contingencies - Guarantees (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CommitmentsAndContingenciesDisclosureTable" xlink:label="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1" xlink:to="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsByNatureAxis" xlink:label="us-gaap_GuaranteeObligationsByNatureAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" xlink:to="us-gaap_GuaranteeObligationsByNatureAxis_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain" xlink:label="us-gaap_GuaranteeObligationsNatureDomain_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GuaranteeObligationsByNatureAxis_639289018885372482" xlink:to="us-gaap_GuaranteeObligationsNatureDomain_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceGuaranteeMember" xlink:label="us-gaap_PerformanceGuaranteeMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_GuaranteeObligationsNatureDomain_639289018885372482" xlink:to="us-gaap_PerformanceGuaranteeMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" xlink:to="srt_RangeAxis_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember" xlink:label="srt_RangeMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeAxis_639289018885372482" xlink:to="srt_RangeMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember_639289018885372482" xlink:to="srt_MinimumMember_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember_639289018885372482" xlink:to="srt_MaximumMember_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_CommitmentsAndContingenciesLineItems" xlink:label="osis_CommitmentsAndContingenciesLineItems_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesDisclosureTable_639289018885372482" xlink:to="osis_CommitmentsAndContingenciesLineItems_639289018885372482" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuarantorObligationTerm1" xlink:label="us-gaap_GuarantorObligationTerm1_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesLineItems_639289018885372482" xlink:to="us-gaap_GuarantorObligationTerm1_639289018885372482" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="us-gaap_GuaranteeObligationsMaximumExposure_639289018885372482" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesLineItems_639289018885372482" xlink:to="us-gaap_GuaranteeObligationsMaximumExposure_639289018885372482" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue" xlink:label="us-gaap_GuaranteeObligationsCurrentCarryingValue_639289018885452756" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="osis_CommitmentsAndContingenciesLineItems_639289018885372482" xlink:to="us-gaap_GuaranteeObligationsCurrentCarryingValue_639289018885452756" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureIncomeTaxesDetails" xlink:type="extended" xlink:title="99941101 - Disclosure - Income Taxes (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_635524462239876449" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_639289018885455129" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract_635524462239876449" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations_639289018885455129" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_DiscreteTaxBenefitExpenseRelatedToEquityBasedCompensationUnderAccountingStandardUpdate" xlink:label="osis_DiscreteTaxBenefitExpenseRelatedToEquityBasedCompensationUnderAccountingStandardUpdate_639289018885455129" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract_635524462239876449" xlink:to="osis_DiscreteTaxBenefitExpenseRelatedToEquityBasedCompensationUnderAccountingStandardUpdate_639289018885455129" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureSegmentInformationByIndustrySegmentDetails" xlink:type="extended" xlink:title="99941201 - Disclosure - Segment Information - By industry segment (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract_635524462240188455" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885455129" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract_635524462240188455" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885455129" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis" xlink:label="srt_ConsolidationItemsAxis_639289018885455129" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885455129" xlink:to="srt_ConsolidationItemsAxis_639289018885455129" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain" xlink:label="srt_ConsolidationItemsDomain_639289018885455129" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ConsolidationItemsAxis_639289018885455129" xlink:to="srt_ConsolidationItemsDomain_639289018885455129" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember" xlink:label="us-gaap_OperatingSegmentsMember_639289018885460416" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ConsolidationItemsDomain_639289018885455129" xlink:to="us-gaap_OperatingSegmentsMember_639289018885460416" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="us-gaap_IntersegmentEliminationMember_639289018885461081" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ConsolidationItemsDomain_639289018885455129" xlink:to="us-gaap_IntersegmentEliminationMember_639289018885461081" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="us-gaap_CorporateNonSegmentMember_639289018885461825" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ConsolidationItemsDomain_639289018885455129" xlink:to="us-gaap_CorporateNonSegmentMember_639289018885461825" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis_639289018885462555" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885455129" xlink:to="us-gaap_StatementBusinessSegmentsAxis_639289018885462555" order="2" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementBusinessSegmentsAxis_639289018885462555" xlink:to="us-gaap_SegmentDomain_639289018885463473" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember" xlink:label="us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain_639289018885463473" xlink:to="us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_639289018885463473" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_SecurityDivisionMember" xlink:label="osis_SecurityDivisionMember_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_639289018885463473" xlink:to="osis_SecurityDivisionMember_639289018885463473" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_OptoelectronicsAndManufacturingDivisionMember" xlink:label="osis_OptoelectronicsAndManufacturingDivisionMember_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_639289018885463473" xlink:to="osis_OptoelectronicsAndManufacturingDivisionMember_639289018885463473" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_HealthcareDivisionMember" xlink:label="osis_HealthcareDivisionMember_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_639289018885463473" xlink:to="osis_HealthcareDivisionMember_639289018885463473" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885455129" xlink:to="srt_MajorCustomersAxis_639289018885463473" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_MajorCustomersAxis_639289018885463473" xlink:to="srt_NameOfMajorCustomerDomain_639289018885463473" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_OneCustomerMember" xlink:label="osis_OneCustomerMember_639289018885463473" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_NameOfMajorCustomerDomain_639289018885463473" xlink:to="osis_OneCustomerMember_639289018885463473" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_639289018885468736" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885455129" xlink:to="us-gaap_ConcentrationRiskByTypeAxis_639289018885468736" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain_639289018885470018" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskByTypeAxis_639289018885468736" xlink:to="us-gaap_ConcentrationRiskTypeDomain_639289018885470018" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="us-gaap_CustomerConcentrationRiskMember_639289018885470630" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskTypeDomain_639289018885470018" xlink:to="us-gaap_CustomerConcentrationRiskMember_639289018885470630" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="us-gaap_SegmentReportingInformationLineItems_639289018885471856" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885455129" xlink:to="us-gaap_SegmentReportingInformationLineItems_639289018885471856" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_639289018885472467" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_639289018885472467" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="2" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="us-gaap_CostOfGoodsAndServicesSold_639289018885473717" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_CostOfGoodsAndServicesSold_639289018885473717" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_639289018885474912" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense_639289018885474912" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense_639289018885475997" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_ResearchAndDevelopmentExpense_639289018885475997" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_SegmentIncomeLossFromOperations" xlink:label="osis_SegmentIncomeLossFromOperations_639289018885476568" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="osis_SegmentIncomeLossFromOperations_639289018885476568" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets_639289018885477793" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_Assets_639289018885477793" order="6" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentExpenditureAdditionToLongLivedAssets" xlink:label="us-gaap_SegmentExpenditureAdditionToLongLivedAssets_639289018885479014" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_SegmentExpenditureAdditionToLongLivedAssets_639289018885479014" order="7" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization_639289018885479621" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_DepreciationDepletionAndAmortization_639289018885479621" order="8" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringSettlementAndImpairmentProvisions" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018885480847" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_RestructuringSettlementAndImpairmentProvisions_639289018885480847" order="9" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss_639289018885482073" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_OperatingIncomeLoss_639289018885482073" order="10" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConcentrationRiskNumberOfCustomer" xlink:label="osis_ConcentrationRiskNumberOfCustomer_639289018885483295" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="osis_ConcentrationRiskNumberOfCustomer_639289018885483295" order="11" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="us-gaap_ConcentrationRiskPercentage1_639289018885483911" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885471856" xlink:to="us-gaap_ConcentrationRiskPercentage1_639289018885483911" order="12" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
  </presentationLink>
  <presentationLink xlink:role="http://www.osi-systems.com/role/DisclosureSegmentInformationOperationsAndIdentifiableAssetsDetails" xlink:type="extended" xlink:title="99941202 - Disclosure - Segment Information - Operations and Identifiable Assets (Details)" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885485077" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885485077" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis_639289018885485077" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885485077" xlink:to="us-gaap_StatementBusinessSegmentsAxis_639289018885485077" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_639289018885485077" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementBusinessSegmentsAxis_639289018885485077" xlink:to="us-gaap_SegmentDomain_639289018885485077" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_SecurityDivisionMember" xlink:label="osis_SecurityDivisionMember_639289018885485077" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentDomain_639289018885485077" xlink:to="osis_SecurityDivisionMember_639289018885485077" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis_639289018885490633" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885485077" xlink:to="srt_MajorCustomersAxis_639289018885490633" order="2" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain_639289018885490895" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_MajorCustomersAxis_639289018885490633" xlink:to="srt_NameOfMajorCustomerDomain_639289018885490895" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_OneCustomerMember" xlink:label="osis_OneCustomerMember_639289018885490895" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_NameOfMajorCustomerDomain_639289018885490895" xlink:to="osis_OneCustomerMember_639289018885490895" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_639289018885490895" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885485077" xlink:to="us-gaap_ConcentrationRiskByBenchmarkAxis_639289018885490895" order="3" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_639289018885490895" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis_639289018885490895" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain_639289018885490895" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SalesRevenueNetMember" xlink:label="us-gaap_SalesRevenueNetMember_639289018885490895" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain_639289018885490895" xlink:to="us-gaap_SalesRevenueNetMember_639289018885490895" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableMember" xlink:label="us-gaap_AccountsReceivableMember_639289018885490895" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain_639289018885490895" xlink:to="us-gaap_AccountsReceivableMember_639289018885490895" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_639289018885490895" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885485077" xlink:to="us-gaap_ConcentrationRiskByTypeAxis_639289018885490895" order="4" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain_639289018885516494" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskByTypeAxis_639289018885490895" xlink:to="us-gaap_ConcentrationRiskTypeDomain_639289018885516494" order="1" use="optional" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="us-gaap_CustomerConcentrationRiskMember_639289018885516494" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskTypeDomain_639289018885516494" xlink:to="us-gaap_CustomerConcentrationRiskMember_639289018885516494" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="us-gaap_SegmentReportingInformationLineItems_639289018885516494" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_639289018885485077" xlink:to="us-gaap_SegmentReportingInformationLineItems_639289018885516494" order="5" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments" xlink:label="us-gaap_NumberOfReportableSegments_639289018885516494" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885516494" xlink:to="us-gaap_NumberOfReportableSegments_639289018885516494" order="1" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="us-gaap_NumberOfOperatingSegments_639289018885516494" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885516494" xlink:to="us-gaap_NumberOfOperatingSegments_639289018885516494" order="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_ConcentrationRiskNumberOfCustomer" xlink:label="osis_ConcentrationRiskNumberOfCustomer_639289018885516494" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885516494" xlink:to="osis_ConcentrationRiskNumberOfCustomer_639289018885516494" order="3" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="3" />
    <loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="us-gaap_ConcentrationRiskPercentage1_639289018885522307" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SegmentReportingInformationLineItems_639289018885516494" xlink:to="us-gaap_ConcentrationRiskPercentage1_639289018885522307" order="4" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
  <presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" xlink:type="extended" xlink:title="995445 - Disclosure - Insider Trading Arrangements" xmlns="http://www.xbrl.org/2003/linkbase">
    <loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_InsiderTradingArrLineItems" xlink:label="ecd_InsiderTradingArrLineItems" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_Rule10b51ArrangementModifiedFlag" xlink:label="osis_Rule10b51ArrangementModifiedFlag_639289018885522307" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_InsiderTradingArrLineItems" xlink:to="osis_Rule10b51ArrangementModifiedFlag_639289018885522307" order="14" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
    <loc xlink:type="locator" xlink:href="osis-20260930.xsd#osis_NonRule10b51ArrangementModifiedFlag" xlink:label="osis_NonRule10b51ArrangementModifiedFlag_639289018885522307" />
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_InsiderTradingArrLineItems" xlink:to="osis_NonRule10b51ArrangementModifiedFlag_639289018885522307" order="15" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" />
  </presentationLink>
</link:linkbase>
