<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Fri Apr 24 18:03:07 UTC 2026 -->
<xs:schema elementFormDefault="qualified" targetNamespace="http://mallinckrodt.com/20251231" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:mnk="http://mallinckrodt.com/20251231" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:us-types="http://xbrl.us/us-types/2009-01-31" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:dtr="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="mnk-20251231_lab.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="mnk-20251231_pre.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef"/>
      <link:linkbaseRef xlink:type="simple" xlink:href="mnk-20251231_def.xml" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef"/>
      <link:roleType roleURI="http://mallinckrodt.com/role/AdditionalDimensions" id="mnk_r_AdditionalDimensions">
        <link:definition>999000 - Disclosure - Pay vs Performance Disclosure - Additional Dimensions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd-sub/2025" schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-sub-2025.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei-sub/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-sub-2025.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:element name="EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsAdjustmentsForEquityAwardsFailedToMeetPerformanceConditionsMember"/>
  <xs:element name="EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfCurrentAwardsVestedDuringCurrentYearMember"/>
  <xs:element name="EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfPriorYearAwardsVestedDuringCurrentYearMember"/>
  <xs:element name="EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsChangeInFairValueAsOfVestingDateOfVestedAwardsDuringCurrentYearMember"/>
  <xs:element name="EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsChangeInFairValueAsOfYearEndOfOutstandingAndUnvestedAwardsGrantedInPriorYearsMember"/>
  <xs:element name="EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsDividendsOrOtherEarningsPaidOnEquityAwardsNotOtherwiseReflectedInFairValueMember"/>
  <xs:element name="EquityAwardsAdjustmentsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsMember"/>
  <xs:element name="EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsAdjustmentsYearEndFairValueOfAwardsGrantedInCurrentYearMember"/>
  <xs:element name="EquityAwardsValueInCompensationTableForTheApplicableYearMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_EquityAwardsValueInCompensationTableForTheApplicableYearMember"/>
  <xs:element name="MarkTrudeauMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_MarkTrudeauMember"/>
  <xs:element name="NetAdjustmentsForEquityAwardsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_NetAdjustmentsForEquityAwardsMember"/>
  <xs:element name="NetAdjustmentsForPensionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_NetAdjustmentsForPensionMember"/>
  <xs:element name="OptionAwardsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_OptionAwardsMember"/>
  <xs:element name="PensionAdjustmentsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_PensionAdjustmentsMember"/>
  <xs:element name="PensionAdjustmentsPriorServiceCostMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_PensionAdjustmentsPriorServiceCostMember"/>
  <xs:element name="PensionAdjustmentsServiceCostMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_PensionAdjustmentsServiceCostMember"/>
  <xs:element name="PensionValueInCompensationTableForTheApplicableYearMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_PensionValueInCompensationTableForTheApplicableYearMember"/>
  <xs:element name="SigurdurOOlafssonMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_SigurdurOOlafssonMember"/>
<!-- [WMV7][u7aC7LhqW1VAAuWzOekMAmqQuw3m6nyMHsTJPBCvH8gCSuE086lgffa5wO8/MIlwJ9B4S7UuwhY3pGQUztR1PHvdFwhi24i2SMouYti8f3RV0ATz/8WvpJdTorPmQPhS5/JBvBf0fmZrJVm1fjCDhItVHd93O1WaCNSUgjW35a/dt7bk/S8pwkSiQWYR24e52yiiIstk5l9IkiJP7LxqSeVxXkD0qxGCRSpbmB6lhZJpoEiQWnAd7tGHvSMbqpWnCIjcSPa/cLLWR+oE4RsUm1AB+88MA9eH8eqSiLjvsWBKO0S2+Osg3jIaTWar/C1dicnyIg==] CSR-->
  <xs:element name="StockAwardsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="mnk_StockAwardsMember"/>
</xs:schema>
