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      <link:roleType roleURI="http://mackenziecapital.com/role/CompositionofInvestmentsatFairValueTable" id="mrc_r_CompositionofInvestmentsatFairValueTable">
        <link:definition>996027 - Disclosure - INVESTMENTS - Composition of Investments at Fair Value (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/ReconciliationofBeginningandEndingBalancesforInvestmentsMeasuredatFairvalueonaRecurringBasisTable" id="mrc_r_ReconciliationofBeginningandEndingBalancesforInvestmentsMeasuredatFairvalueonaRecurringBasisTable">
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/BalanceSheetClassificationTable" id="mrc_r_BalanceSheetClassificationTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/FutureUndiscountedLeasePaymentsforFinanceLeasesTableAlt1" id="mrc_r_FutureUndiscountedLeasePaymentsforFinanceLeasesTableAlt1">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/SupplementalFinanceLeaseInformationTable" id="mrc_r_SupplementalFinanceLeaseInformationTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/VARIABLEINTERESTENTITIESDetails" id="mrc_r_VARIABLEINTERESTENTITIESDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/AnnualAssetManagementFeesTable" id="mrc_r_AnnualAssetManagementFeesTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/RelatedPartyExpensesTable" id="mrc_r_RelatedPartyExpensesTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/MARGINLOANSDetails" id="mrc_r_MARGINLOANSDetails">
        <link:definition>996043 - Disclosure - MARGIN LOANS (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/MORTGAGENOTESPAYABLENOTESPAYABLEANDDEBTGUARANTYDetails" id="mrc_r_MORTGAGENOTESPAYABLENOTESPAYABLEANDDEBTGUARANTYDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsPVTNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsPVTNotesPayableTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsMacKenzieShorelineMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsMacKenzieShorelineMortgageNotesPayableTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsFirstMainMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsFirstMainMortgageNotesPayableTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPayments1300MainMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPayments1300MainMortgageNotesPayableTable">
        <link:definition>996049 - Disclosure - MORTGAGE NOTES PAYABLE, NOTES PAYABLE AND DEBT GUARANTY - Projected Principal Payments, 1300 Main Mortgage Notes Payable (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsWoodlandCorporateCenterTwoMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsWoodlandCorporateCenterTwoMortgageNotesPayableTable">
        <link:definition>996050 - Disclosure - MORTGAGE NOTES PAYABLE, NOTES PAYABLE AND DEBT GUARANTY - Projected Principal Payments, Woodland Corporate Center Two Mortgage Notes Payable (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsMainStreetWestMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsMainStreetWestMortgageNotesPayableTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsGVECMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsGVECMortgageNotesPayableTable">
        <link:definition>996052 - Disclosure - MORTGAGE NOTES PAYABLE, NOTES PAYABLE AND DEBT GUARANTY - Projected Principal Payments, GVEC Mortgage Notes Payable (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsOneHarborCenterLPMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsOneHarborCenterLPMortgageNotesPayableTable">
        <link:definition>996053 - Disclosure - MORTGAGE NOTES PAYABLE, NOTES PAYABLE AND DEBT GUARANTY - Projected Principal Payments, One Harbor Center, LP Mortgage Notes Payable (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsMacKenzieSatelliteMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsMacKenzieSatelliteMortgageNotesPayableTable">
        <link:definition>996054 - Disclosure - MORTGAGE NOTES PAYABLE, NOTES PAYABLE AND DEBT GUARANTY - Projected Principal Payments, MacKenzie Satellite Mortgage Notes Payable (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsGreenValleyMedicalCenterMortgageNotesPayableTable" id="mrc_r_ProjectedPrincipalPaymentsGreenValleyMedicalCenterMortgageNotesPayableTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ProjectedPrincipalPaymentsSecuredPromissoryNoteAgreementTable" id="mrc_r_ProjectedPrincipalPaymentsSecuredPromissoryNoteAgreementTable">
        <link:definition>996056 - Disclosure - MORTGAGE NOTES PAYABLE, NOTES PAYABLE AND DEBT GUARANTY - Projected Principal Payments, Secured Promissory Note Agreement (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
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        <link:definition>996057 - Disclosure - EARNINGS PER SHARE (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/ComputationofBasicandDilutedEarningsperShareTable" id="mrc_r_ComputationofBasicandDilutedEarningsperShareTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/SHAREOFFERINGSANDFEESDetails" id="mrc_r_SHAREOFFERINGSANDFEESDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/SHAREREPURCHASEPLANDetails" id="mrc_r_SHAREREPURCHASEPLANDetails">
        <link:definition>996060 - Disclosure - SHARE REPURCHASE PLAN (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/RepurchasedSharesTable" id="mrc_r_RepurchasedSharesTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/STOCKHOLDERDIVIDENDSANDDRIPDetails" id="mrc_r_STOCKHOLDERDIVIDENDSANDDRIPDetails">
        <link:definition>996062 - Disclosure - STOCKHOLDER DIVIDENDS AND DRIP (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/StockholderDividendsTable" id="mrc_r_StockholderDividendsTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/WARRANTSDetails" id="mrc_r_WARRANTSDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/SummarizedWarrantActivityTable" id="mrc_r_SummarizedWarrantActivityTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      </link:roleType>
      <link:roleType roleURI="http://mackenziecapital.com/role/SEGMENTREPORTINGDetails" id="mrc_r_SEGMENTREPORTINGDetails">
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/SegmentReportingInformationTable" id="mrc_r_SegmentReportingInformationTable">
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/SegmentAssetsTable" id="mrc_r_SegmentAssetsTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/SegmentLiabilitiesTable" id="mrc_r_SegmentLiabilitiesTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/COMMITMENTSDetails" id="mrc_r_COMMITMENTSDetails">
        <link:definition>996070 - Disclosure - COMMITMENTS (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/FORMATIONOFMACANDSUMMARIZEDFINANCIALINFORMATIONDetails" id="mrc_r_FORMATIONOFMACANDSUMMARIZEDFINANCIALINFORMATIONDetails">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://mackenziecapital.com/role/SummaryofFinancialInformationTable" id="mrc_r_SummaryofFinancialInformationTable">
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        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
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        <link:definition>996073 - Disclosure - SUBSEQUENT EVENTS (Details)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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  <xs:element name="DisposalGroupIncludingDiscontinuedOperationInvestmentsIncomeRentsAndOtherReceivables" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DisposalGroupIncludingDiscontinuedOperationInvestmentsIncomeRentsAndOtherReceivables"/>
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationAllowanceForImpairmentOnAssetsHeldForSale" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DisposalGroupIncludingDiscontinuedOperationAllowanceForImpairmentOnAssetsHeldForSale"/>
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationDeferredRentAndOtherLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DisposalGroupIncludingDiscontinuedOperationDeferredRentAndOtherLiabilities"/>
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationFinanceLeaseLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DisposalGroupIncludingDiscontinuedOperationFinanceLeaseLiabilities"/>
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationBelowmarketLeaseLiabilitiesNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DisposalGroupIncludingDiscontinuedOperationBelowmarketLeaseLiabilitiesNet"/>
  <xs:element name="VariableInterestEntityFairValueInvestment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_VariableInterestEntityFairValueInvestment"/>
  <xs:element name="VariableInterestEntityNonconsolidatedAssetsCarryingAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_VariableInterestEntityNonconsolidatedAssetsCarryingAmount"/>
  <xs:element name="DueToRelatedPartiesAssetManagementFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DueToRelatedPartiesAssetManagementFees"/>
  <xs:element name="DueToRelatedPartiesBonusManagementFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DueToRelatedPartiesBonusManagementFees"/>
  <xs:element name="DueToRelatedPartiesAdministrativeCostReimbursements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DueToRelatedPartiesAdministrativeCostReimbursements"/>
  <xs:element name="AssetAcquisitionFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_AssetAcquisitionFees"/>
  <xs:element name="DueToRelatedPartiesAssetAcquisitionFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DueToRelatedPartiesAssetAcquisitionFees"/>
  <xs:element name="DueToRelatedPartiesTransferAgentCostReimbursements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DueToRelatedPartiesTransferAgentCostReimbursements"/>
  <xs:element name="IncurredOfferingCostsReimbursement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_IncurredOfferingCostsReimbursement"/>
  <xs:element name="DueToRelatedPartiesOrganizationAndOfferingCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DueToRelatedPartiesOrganizationAndOfferingCost"/>
  <xs:element name="OtherExpensesDueToRelatedParty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_OtherExpensesDueToRelatedParty"/>
  <xs:element name="PreferredStockCashDividend" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_PreferredStockCashDividend"/>
  <xs:element name="WarrantWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WarrantWeightedAverageExercisePrice"/>
  <xs:element name="NumberOfWarrantsExercised" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfWarrantsExercised"/>
  <xs:element name="WarrantWeightedAverageExercisePrices" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WarrantWeightedAverageExercisePrices"/>
  <xs:element name="NumberOfWarrantsExpired" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfWarrantsExpired"/>
  <xs:element name="BonusManagementFeesToRelatedParty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_BonusManagementFeesToRelatedParty"/>
  <xs:element name="RealEstateAccumulatedImpairment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_RealEstateAccumulatedImpairment"/>
  <xs:element name="RealEstateImpairmentLoss" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_RealEstateImpairmentLoss"/>
  <xs:element name="RealEstateCompaniesInvestmentInRealEstateReclassifiedToAssetsHeldForSale" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_RealEstateCompaniesInvestmentInRealEstateReclassifiedToAssetsHeldForSale"/>
  <xs:element name="RealEstateCompaniesInvestmentInRealEstateAccumulatedDepreciationDisposals" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_RealEstateCompaniesInvestmentInRealEstateAccumulatedDepreciationDisposals"/>
  <xs:element name="RealEstateAccumulatedDepreciationReclassifiedToAssetsHeldForSale" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_RealEstateAccumulatedDepreciationReclassifiedToAssetsHeldForSale"/>
  <xs:element name="ConsolidatingOperatingPropertiesNameOfProperty" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ConsolidatingOperatingPropertiesNameOfProperty"/>
  <xs:element name="ConsolidatingOperatingPropertiesPropertyOwner" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ConsolidatingOperatingPropertiesPropertyOwner"/>
  <xs:element name="ConsolidatedOperatingPropertiesPropertyLocation" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ConsolidatedOperatingPropertiesPropertyLocation"/>
  <xs:element name="NumberOfTenants" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfTenants"/>
  <xs:element name="PropertyBuiltUpYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PropertyBuiltUpYear"/>
  <xs:element name="OperatingPartnershipOwnershipPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_OperatingPartnershipOwnershipPercentage"/>
  <xs:element name="FairValueUnobservableInputsPercentageRate" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_FairValueUnobservableInputsPercentageRate"/>
  <xs:element name="SharesAuthorized" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_SharesAuthorized"/>
  <xs:element name="PercentageOfBaseManagementFee" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfBaseManagementFee"/>
  <xs:element name="PercentageOfBonusManagementFee" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfBonusManagementFee"/>
  <xs:element name="RelatedPartyTransactionRenewalTermOfAgreement" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_RelatedPartyTransactionRenewalTermOfAgreement"/>
  <xs:element name="PortfolioRiskConcentrationPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PortfolioRiskConcentrationPercentage"/>
  <xs:element name="OutstandingSharesExchangeRatio" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_OutstandingSharesExchangeRatio"/>
  <xs:element name="NetAssetValuePerUnit" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_NetAssetValuePerUnit"/>
  <xs:element name="OperatingPartnershipOwnShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_OperatingPartnershipOwnShares"/>
  <xs:element name="TradingDayToCalculateAverageTradingPrice" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_TradingDayToCalculateAverageTradingPrice"/>
  <xs:element name="TradingDayPeriodToCalculateVolumeWeightedAverageTradingPrice" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_TradingDayPeriodToCalculateVolumeWeightedAverageTradingPrice"/>
  <xs:element name="OperatingPartnershipAmountPreferenceShares" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_OperatingPartnershipAmountPreferenceShares"/>
  <xs:element name="PreferredStockAuthorizedAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_PreferredStockAuthorizedAmount"/>
  <xs:element name="PreferredStockInitialOfferingPrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_PreferredStockInitialOfferingPrice"/>
  <xs:element name="CommonAndPreferredStockWarrantsRightsAuthorizedAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_CommonAndPreferredStockWarrantsRightsAuthorizedAmount"/>
  <xs:element name="MinimumPeriodForAggregateOfferingPrice" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MinimumPeriodForAggregateOfferingPrice"/>
  <xs:element name="PercentageOfNumberOfSharesIssuedInTransaction" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfNumberOfSharesIssuedInTransaction"/>
  <xs:element name="IncreaseInParValueDueToReverseStockSplit" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_IncreaseInParValueDueToReverseStockSplit"/>
  <xs:element name="ProceedsFromIssuanceOfPreferredStockDividendReinvestmentPlan" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_ProceedsFromIssuanceOfPreferredStockDividendReinvestmentPlan"/>
  <xs:element name="PercentageOfTaxableIncomeAnnualDistributionRequirement" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfTaxableIncomeAnnualDistributionRequirement"/>
  <xs:element name="NondeductibleExciseTax" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NondeductibleExciseTax"/>
  <xs:element name="NumberOfEntitiesIncomeTaxLiabilitiesFlowThroughToPartners" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfEntitiesIncomeTaxLiabilitiesFlowThroughToPartners"/>
  <xs:element name="TaxableIncomeOfSubsidiaries" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_TaxableIncomeOfSubsidiaries"/>
  <xs:element name="UncertainTaxPositions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_UncertainTaxPositions"/>
  <xs:element name="NumberOfTradingDays" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfTradingDays"/>
  <xs:element name="NumberOfPartnershipsWithSolarEquipmentLeases" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfPartnershipsWithSolarEquipmentLeases"/>
  <xs:element name="NumberOfInvestmentsInLimitedLiabilityCompany" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfInvestmentsInLimitedLiabilityCompany"/>
  <xs:element name="NumberOfAdvisoryAgreements" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfAdvisoryAgreements"/>
  <xs:element name="PercentageOfAssetManagementFee" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfAssetManagementFee"/>
  <xs:element name="PercentageOfAcquisitionFee" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfAcquisitionFee"/>
  <xs:element name="PercentageOfIncentiveManagementFee" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfIncentiveManagementFee"/>
  <xs:element name="PercentageToEffectIncentiveManagementFee" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageToEffectIncentiveManagementFee"/>
  <xs:element name="AnnualFee" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_AnnualFee"/>
  <xs:element name="AssetManagementFeeBaseGrossAssetsExcludingDepreciationAndAmortization" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_AssetManagementFeeBaseGrossAssetsExcludingDepreciationAndAmortization"/>
  <xs:element name="NumberOfPropertyLimitedPartnership" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfPropertyLimitedPartnership"/>
  <xs:element name="DirectOperatingCostsAndConstructionOfTenantImprovements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DirectOperatingCostsAndConstructionOfTenantImprovements"/>
  <xs:element name="CumulativeDeferredOfferingCostsIncurred" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_CumulativeDeferredOfferingCostsIncurred"/>
  <xs:element name="PercentageOfBrokerFeeNotIncurred" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfBrokerFeeNotIncurred"/>
  <xs:element name="IncurredOfferingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_IncurredOfferingCosts"/>
  <xs:element name="OfferingCostPaidInConnectionWithPreferredStockOffering" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_OfferingCostPaidInConnectionWithPreferredStockOffering"/>
  <xs:element name="AveragePeriodOfYieldUsedForInterestRatesCalculation" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AveragePeriodOfYieldUsedForInterestRatesCalculation"/>
  <xs:element name="AmortizationPeriodForMonthlyPaymentsOfPrincipalAndInterests" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AmortizationPeriodForMonthlyPaymentsOfPrincipalAndInterests"/>
  <xs:element name="NumberOfTimeTheLoansExtended" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfTimeTheLoansExtended"/>
  <xs:element name="LoansExtensionPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LoansExtensionPeriod"/>
  <xs:element name="DebtInstrumentExtendedMaturityDate" type="xbrli:dateItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentExtendedMaturityDate"/>
  <xs:element name="LoanPrincipalPayableOnMaturity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_LoanPrincipalPayableOnMaturity"/>
  <xs:element name="AmountOfContributionToRepayLoanPayableOnMaturity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_AmountOfContributionToRepayLoanPayableOnMaturity"/>
  <xs:element name="LoanReceivableFromNonControllingInterest" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_LoanReceivableFromNonControllingInterest"/>
  <xs:element name="PercentageOfLoanReceivableFromNonControllingInterest" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_PercentageOfLoanReceivableFromNonControllingInterest"/>
  <xs:element name="NumberOfMonthsForAnnualInterest" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfMonthsForAnnualInterest"/>
  <xs:element name="DebtInstrumentTermOfVariableRate" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentTermOfVariableRate"/>
  <xs:element name="DebtInstrumentFixedRateAndBasisSpreadOnVariableRate" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentFixedRateAndBasisSpreadOnVariableRate"/>
  <xs:element name="LongTermDebtPrepaymentPenalty" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_LongTermDebtPrepaymentPenalty"/>
  <xs:element name="DebtInstrumentBasisSpreadOnVariableRateFloor" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentBasisSpreadOnVariableRateFloor"/>
  <xs:element name="MasterLeasePercentageLeased" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MasterLeasePercentageLeased"/>
  <xs:element name="RentableSpace" type="dtr:areaItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_RentableSpace"/>
  <xs:element name="AssetAcquisitionConsiderationTransferredNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_AssetAcquisitionConsiderationTransferredNet"/>
  <xs:element name="LineOfCreditFacilityOriginationFeePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LineOfCreditFacilityOriginationFeePercentage"/>
  <xs:element name="DebtInstrumentTransactionExpenses" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentTransactionExpenses"/>
  <xs:element name="DebtInstrumentOutstandingPurchasePriceTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentOutstandingPurchasePriceTerm"/>
  <xs:element name="DebtInstrumentMonitoringFeePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentMonitoringFeePercentage"/>
  <xs:element name="DebtInstrumentIncreaseInPrincipalAmountPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtInstrumentIncreaseInPrincipalAmountPercentage"/>
  <xs:element name="ContingentLiabilityRelatedToGuarantyOnMortgageLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_ContingentLiabilityRelatedToGuarantyOnMortgageLoans"/>
  <xs:element name="PaymentsForReinvestmentOfPreferredStockDividendReinvestmentPlan" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_PaymentsForReinvestmentOfPreferredStockDividendReinvestmentPlan"/>
  <xs:element name="DividendsPayableAmountPerSharePerMonth" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_DividendsPayableAmountPerSharePerMonth"/>
  <xs:element name="PreferredStockDividendRateLiquidationPreferencePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PreferredStockDividendRateLiquidationPreferencePercentage"/>
  <xs:element name="PaymentsOfPartnershipDistributionDividendReinvestedPlanAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="mrc_PaymentsOfPartnershipDistributionDividendReinvestedPlanAmount"/>
  <xs:element name="PaymentsOfPartnershipDistribution" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_PaymentsOfPartnershipDistribution"/>
  <xs:element name="CashSettlementProvisions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="mrc_CashSettlementProvisions"/>
  <xs:element name="NumberOfDevelopmentProperties" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfDevelopmentProperties"/>
  <xs:element name="NumberOfPropertyOwnedByOperatingPartnership" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfPropertyOwnedByOperatingPartnership"/>
  <xs:element name="NumberOfSharesPurchased" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NumberOfSharesPurchased"/>
  <xs:element name="ATMSalesAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ATMSalesAgreementMember"/>
  <xs:element name="AboveMarketLeaseAssetsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AboveMarketLeaseAssetsMember"/>
  <xs:element name="AdvisoryAgreementsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AdvisoryAgreementsMember"/>
  <xs:element name="AmendedAndRestatedInvestmentAdvisoryAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AmendedAndRestatedInvestmentAdvisoryAgreementMember"/>
  <xs:element name="AnnualAssetManagementFee15PercentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AnnualAssetManagementFee15PercentMember"/>
  <xs:element name="AnnualAssetManagementFee2PercentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AnnualAssetManagementFee2PercentMember"/>
  <xs:element name="AnnualAssetManagementFee3PercentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AnnualAssetManagementFee3PercentMember"/>
  <xs:element name="AtTheMarketOfferingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AtTheMarketOfferingMember"/>
  <xs:element name="AuroraAtGreenValleyMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_AuroraAtGreenValleyMember"/>
  <xs:element name="BelowMarketLeaseLiabilitiesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_BelowMarketLeaseLiabilitiesMember"/>
  <xs:element name="CampusLaneOfficeBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CampusLaneOfficeBuildingMember"/>
  <xs:element name="CampusLaneResidentialLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CampusLaneResidentialLLCMember"/>
  <xs:element name="CampusLaneResidentialLandMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CampusLaneResidentialLandMember"/>
  <xs:element name="CollateralNoteMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CollateralNoteMember"/>
  <xs:element name="ColumbiaStateBankMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ColumbiaStateBankMember"/>
  <xs:element name="CommercialSegmentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CommercialSegmentMember"/>
  <xs:element name="CommodoreApartmentBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CommodoreApartmentBuildingMember"/>
  <xs:element name="CommodoreApartmentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CommodoreApartmentMember"/>
  <xs:element name="CommonStockAndPreFundedWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CommonStockAndPreFundedWarrantsMember"/>
  <xs:element name="CommonStockWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_CommonStockWarrantsMember"/>
  <xs:element name="DRIPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DRIPMember"/>
  <xs:element name="DebtMarkToMarketMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_DebtMarkToMarketMember"/>
  <xs:element name="EverTrustBankMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_EverTrustBankMember"/>
  <xs:element name="ExchangeBankOfSantaRosaMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ExchangeBankOfSantaRosaMember"/>
  <xs:element name="FirstMainLPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_FirstMainLPMember"/>
  <xs:element name="FirstMainOfficeBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_FirstMainOfficeBuildingMember"/>
  <xs:element name="FirstNorthernBankOfDixonMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_FirstNorthernBankOfDixonMember"/>
  <xs:element name="FirstRepublicBankMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_FirstRepublicBankMember"/>
  <xs:element name="FurnitureFixturesAndEquipmentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_FurnitureFixturesAndEquipmentMember"/>
  <xs:element name="GVExecutiveCenterLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GVExecutiveCenterLLCMember"/>
  <xs:element name="GeneralPartnershipAndLakemontPartnersInterestMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GeneralPartnershipAndLakemontPartnersInterestMember"/>
  <xs:element name="GeneralPartnershipInterestFairValueOptionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GeneralPartnershipInterestFairValueOptionMember"/>
  <xs:element name="GeneralPartnershipInterestIncludingGeneralPartnershipInterestFairValueOptionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GeneralPartnershipInterestIncludingGeneralPartnershipInterestFairValueOptionMember"/>
  <xs:element name="GeneralPartnershipInterestMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GeneralPartnershipInterestMember"/>
  <xs:element name="GreenValleyExecutiveCenterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GreenValleyExecutiveCenterMember"/>
  <xs:element name="GreenValleyMedicalCenterLPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GreenValleyMedicalCenterLPMember"/>
  <xs:element name="GreenValleyMedicalCenterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_GreenValleyMedicalCenterMember"/>
  <xs:element name="HollywoodApartmentsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_HollywoodApartmentsMember"/>
  <xs:element name="HollywoodPropertyMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_HollywoodPropertyMember"/>
  <xs:element name="IncludedInRevenueFromTenantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_IncludedInRevenueFromTenantsMember"/>
  <xs:element name="InnovateNapaMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_InnovateNapaMember"/>
  <xs:element name="JuniorDebtWithMaturityDateDecember312025Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_JuniorDebtWithMaturityDateDecember312025Member"/>
  <xs:element name="JuniorDebtWithMaturityDateDecember312026Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_JuniorDebtWithMaturityDateDecember312026Member"/>
  <xs:element name="JuniorDebtWithMaturityDateDecember312028Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_JuniorDebtWithMaturityDateDecember312028Member"/>
  <xs:element name="JuniorDebtWithMaturityDateMarch312025Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_JuniorDebtWithMaturityDateMarch312025Member"/>
  <xs:element name="LadderCapitalFinanceMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LadderCapitalFinanceMember"/>
  <xs:element name="LakemontPartnersLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LakemontPartnersLLCMember"/>
  <xs:element name="LimitedPartnershipInterestFairValueOptionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LimitedPartnershipInterestFairValueOptionMember"/>
  <xs:element name="LimitedPartnershipInterestMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LimitedPartnershipInterestMember"/>
  <xs:element name="LimitedPartnershipMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LimitedPartnershipMember"/>
  <xs:element name="LondonInterbankOfferedRateMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_LondonInterbankOfferedRateMember"/>
  <xs:element name="MACGroupMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MACGroupMember"/>
  <xs:element name="MRCAuroraConstructionLoanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MRCAuroraConstructionLoanMember"/>
  <xs:element name="MacKenzieApartmentCommunitiesIncMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MacKenzieApartmentCommunitiesIncMember"/>
  <xs:element name="MacKenzieBAAIGShorelineLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MacKenzieBAAIGShorelineLLCMember"/>
  <xs:element name="MacKenzieNYRealEstate2CorpMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MacKenzieNYRealEstate2CorpMember"/>
  <xs:element name="MacKenzieSatelliteMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MacKenzieSatelliteMember"/>
  <xs:element name="MadisonPVTPartnersLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MadisonPVTPartnersLLCMember"/>
  <xs:element name="MainOfficeBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MainOfficeBuildingMember"/>
  <xs:element name="MainStreetWestMortgageMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MainStreetWestMortgageMember"/>
  <xs:element name="MainStreetWestOfficeBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MainStreetWestOfficeBuildingMember"/>
  <xs:element name="MartinPlazaAssociatesLPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MartinPlazaAssociatesLPMember"/>
  <xs:element name="MeriwestCreditUnionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_MeriwestCreditUnionMember"/>
  <xs:element name="NationalHealthcarePropertiesIncMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NationalHealthcarePropertiesIncMember"/>
  <xs:element name="NonTradedCompaniesIncludingNonTradedCompanyFairValueOptionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NonTradedCompaniesIncludingNonTradedCompanyFairValueOptionMember"/>
  <xs:element name="NonTradedCompaniesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NonTradedCompaniesMember"/>
  <xs:element name="NorthernCaliforniaLaborersPensionFundMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_NorthernCaliforniaLaborersPensionFundMember"/>
  <xs:element name="O2025Q1DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2025Q1DividendsMember"/>
  <xs:element name="O2025Q2DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2025Q2DividendsMember"/>
  <xs:element name="O2025Q3DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2025Q3DividendsMember"/>
  <xs:element name="O2025Q4DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2025Q4DividendsMember"/>
  <xs:element name="O2026Q1DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2026Q1DividendsMember"/>
  <xs:element name="O2026Q2DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2026Q2DividendsMember"/>
  <xs:element name="O2026Q31DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2026Q31DividendsMember"/>
  <xs:element name="O2026Q32DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2026Q32DividendsMember"/>
  <xs:element name="O2026Q33DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2026Q33DividendsMember"/>
  <xs:element name="O2026Q3DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2026Q3DividendsMember"/>
  <xs:element name="O2026Q4DividendsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_O2026Q4DividendsMember"/>
  <xs:element name="One300MainLPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_One300MainLPMember"/>
  <xs:element name="OneHarborCenterLPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_OneHarborCenterLPMember"/>
  <xs:element name="OneHarborCenterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_OneHarborCenterMember"/>
  <xs:element name="OperatingPartnershipConversionTransactionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_OperatingPartnershipConversionTransactionMember"/>
  <xs:element name="OperatingPartnershipMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_OperatingPartnershipMember"/>
  <xs:element name="PTHillviewMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PTHillviewMember"/>
  <xs:element name="PVTMadisonPartnersLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PVTMadisonPartnersLLCMember"/>
  <xs:element name="PacificPremierBankMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PacificPremierBankMember"/>
  <xs:element name="Plan12Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Plan12Member"/>
  <xs:element name="Plan13Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Plan13Member"/>
  <xs:element name="Plan14Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Plan14Member"/>
  <xs:element name="Plan15Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Plan15Member"/>
  <xs:element name="Plan16Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Plan16Member"/>
  <xs:element name="Plan3Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Plan3Member"/>
  <xs:element name="PreFundedWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PreFundedWarrantsMember"/>
  <xs:element name="PreferredSharesConversionTransactionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PreferredSharesConversionTransactionMember"/>
  <xs:element name="PreliminaryOfferingCircularMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_PreliminaryOfferingCircularMember"/>
  <xs:element name="RegisteredOfferingAndConcurrentPrivatePlacementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_RegisteredOfferingAndConcurrentPrivatePlacementMember"/>
  <xs:element name="ResidentialSegmentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ResidentialSegmentMember"/>
  <xs:element name="SatellitePlaceBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SatellitePlaceBuildingMember"/>
  <xs:element name="SatellitePlaceOfficeBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SatellitePlaceOfficeBuildingMember"/>
  <xs:element name="SecondOfferingCircularMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecondOfferingCircularMember"/>
  <xs:element name="SecuredPromissoryNoteAgreementFiveMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecuredPromissoryNoteAgreementFiveMember"/>
  <xs:element name="SecuredPromissoryNoteAgreementFourMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecuredPromissoryNoteAgreementFourMember"/>
  <xs:element name="SecuredPromissoryNoteAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecuredPromissoryNoteAgreementMember"/>
  <xs:element name="SecuredPromissoryNoteAgreementSixMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecuredPromissoryNoteAgreementSixMember"/>
  <xs:element name="SecuredPromissoryNoteAgreementThreeMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecuredPromissoryNoteAgreementThreeMember"/>
  <xs:element name="SecuredPromissoryNoteAgreementTwoMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecuredPromissoryNoteAgreementTwoMember"/>
  <xs:element name="SecuritiesPurchaseAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SecuritiesPurchaseAgreementMember"/>
  <xs:element name="SeriesAAndBPreferredStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SeriesAAndBPreferredStockMember"/>
  <xs:element name="SeriesACommonStockWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SeriesACommonStockWarrantsMember"/>
  <xs:element name="SeriesAPreferredUnitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SeriesAPreferredUnitsMember"/>
  <xs:element name="SeriesBCommonStockWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SeriesBCommonStockWarrantsMember"/>
  <xs:element name="SeriesBPreferredUnitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SeriesBPreferredUnitsMember"/>
  <xs:element name="ShorelineApartmentsBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ShorelineApartmentsBuildingMember"/>
  <xs:element name="ShorelineApartmentsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ShorelineApartmentsMember"/>
  <xs:element name="SmallBusinessAdministrationLoanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SmallBusinessAdministrationLoanMember"/>
  <xs:element name="StatisticalReleaseH15Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_StatisticalReleaseH15Member"/>
  <xs:element name="StreetvilleCapitalLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_StreetvilleCapitalLLCMember"/>
  <xs:element name="SummitBankMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_SummitBankMember"/>
  <xs:element name="TheParkViewApartmentsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_TheParkViewApartmentsMember"/>
  <xs:element name="ThereafterOctober12027Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ThereafterOctober12027Member"/>
  <xs:element name="TotalOwnershipInterestsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_TotalOwnershipInterestsMember"/>
  <xs:element name="TravisCreditUnionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_TravisCreditUnionMember"/>
  <xs:element name="Two20CampusLaneLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Two20CampusLaneLLCMember"/>
  <xs:element name="Two20CampusLaneOfficeBuildingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_Two20CampusLaneOfficeBuildingMember"/>
  <xs:element name="UntilOctober12027Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_UntilOctober12027Member"/>
  <xs:element name="ValleyStrongCreditUnionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ValleyStrongCreditUnionMember"/>
  <xs:element name="WellsFargoBankMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WellsFargoBankMember"/>
  <xs:element name="WesternAllianceBankMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WesternAllianceBankMember"/>
  <xs:element name="WestsideProfessionalCenterILPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WestsideProfessionalCenterILPMember"/>
  <xs:element name="WisemanCompanyManagementLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WisemanCompanyManagementLLCMember"/>
  <xs:element name="WisemanFamilyTrustMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WisemanFamilyTrustMember"/>
  <xs:element name="WoodlandCorporateCenterMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WoodlandCorporateCenterMember"/>
  <xs:element name="WoodlandCorporateCenterTwoLPMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_WoodlandCorporateCenterTwoLPMember"/>
  <xs:element name="FORMATIONOFMACANDSUMMARIZEDFINANCIALINFORMATIONAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_FORMATIONOFMACANDSUMMARIZEDFINANCIALINFORMATIONAbstract"/>
  <xs:element name="RealEstateAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_RealEstateAssetsAbstract"/>
  <xs:element name="STOCKHOLDERDIVIDENDSANDDRIPAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_STOCKHOLDERDIVIDENDSANDDRIPAbstract"/>
  <xs:element name="ShareRepurchasePlanAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_ShareRepurchasePlanAbstract"/>
  <xs:element name="VARIABLEINTERESTENTITIESAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mrc_VARIABLEINTERESTENTITIESAbstract"/>
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</xs:schema>
