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  <xs:element id="mh_LineOfCreditFacilityFixedChargeCoverageRatioThresholdAmount" abstract="false" name="LineOfCreditFacilityFixedChargeCoverageRatioThresholdAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_LineOfCreditFacilityFixedChargeCoverageRatioMinimum" abstract="false" name="LineOfCreditFacilityFixedChargeCoverageRatioMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="mh_LineOfCreditFacilityFixedChargeCoverageRatioThresholdConsecutiveCalendarDays" abstract="false" name="LineOfCreditFacilityFixedChargeCoverageRatioThresholdConsecutiveCalendarDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="mh_DebtInstrumentRedemptionDiscount" abstract="false" name="DebtInstrumentRedemptionDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_AdjustedEarningsBeforeInterestTaxDepreciationAndAmortization" abstract="false" name="AdjustedEarningsBeforeInterestTaxDepreciationAndAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_EffectiveIncomeTaxRateReconciliationForeignTaxesWithheldAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignTaxesWithheldAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_EffectiveIncomeTaxRateReconciliationForeignTaxesWithheldPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignTaxesWithheldPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mh_EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mh_EffectiveIncomeTaxRateReconciliationForeignWithholdingAndBranchTaxesPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignWithholdingAndBranchTaxesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mh_EffectiveIncomeTaxRateReconciliationForeignExchangePercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignExchangePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mh_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mh_DeferredTaxAssetsInventoryAndProductDevelopmentCosts" abstract="false" name="DeferredTaxAssetsInventoryAndProductDevelopmentCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_DeferredTaxAssetsOperatingLeaseLiability" abstract="false" name="DeferredTaxAssetsOperatingLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_DeferredTaxAssetsLossAndCreditCarryforwards" abstract="false" name="DeferredTaxAssetsLossAndCreditCarryforwards" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_DeferredTaxLiabilitiesFiniteLivedIntangibleAssetsAndPropertyPlantAndEquipment" abstract="false" name="DeferredTaxLiabilitiesFiniteLivedIntangibleAssetsAndPropertyPlantAndEquipment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_DeferredTaxLiabilitiesDeferredExpenseCapitalizedContractCosts" abstract="false" name="DeferredTaxLiabilitiesDeferredExpenseCapitalizedContractCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_DeferredTaxAssetsLiabilitiesGross" abstract="false" name="DeferredTaxAssetsLiabilitiesGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_OperatingLossCarryforwardsSubjectToExpiration" abstract="false" name="OperatingLossCarryforwardsSubjectToExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_IncomeTaxCreditPurchasedNotionalValue" abstract="false" name="IncomeTaxCreditPurchasedNotionalValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_IncomeTaxCreditsPurchasedConsideration" abstract="false" name="IncomeTaxCreditsPurchasedConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_ServiceBasedStockOptionsMember" abstract="true" name="ServiceBasedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mh_ServiceAndMarketBasedStockOptionsMember" abstract="true" name="ServiceAndMarketBasedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mh_A2021PlanMember" abstract="true" name="A2021PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mh_A2025PlanMember" abstract="true" name="A2025PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mh_ShareBasedCompensationArrangementByShareBasedPaymentAwardChangeInControlInvestedCapitalRealizedMultipleMinimum" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardChangeInControlInvestedCapitalRealizedMultipleMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="mh_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageOfTarget" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageOfTarget" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="mh_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAfterVestingDateNumberOfQuarters" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsAfterVestingDateNumberOfQuarters" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="mh_LeaseRightOfUseAsset" abstract="false" name="LeaseRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_LeaseLiability" abstract="false" name="LeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_WeightedAverageRemainingLeaseTermAbstract" abstract="true" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="mh_LeasesWeightedAverageDiscountRateAbstract" abstract="true" name="LeasesWeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="mh_FinanceLeaseCostAbstract" abstract="true" name="FinanceLeaseCostAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="mh_CashFlowLesseeAbstract" abstract="true" name="CashFlowLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="mh_SharesAuthorized" abstract="false" name="SharesAuthorized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="mh_EarningsLossPerShareComputationNumeratorAbstract" abstract="true" name="EarningsLossPerShareComputationNumeratorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="mh_CommonStockEquivalentsExcludedFromComputationOfEarningsPerShareAmount" abstract="false" name="CommonStockEquivalentsExcludedFromComputationOfEarningsPerShareAmount" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="mh_AdvisoryAgreementManagementFeesMember" abstract="true" name="AdvisoryAgreementManagementFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mh_AdvisoryAgreementExpenseReimbursementsMember" abstract="true" name="AdvisoryAgreementExpenseReimbursementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="mh_AdvisoryAgreementAnnualManagementFeeExpense" abstract="false" name="AdvisoryAgreementAnnualManagementFeeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="mh_SECSchedule1209AllowanceReturnsMember" abstract="true" name="SECSchedule1209AllowanceReturnsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
