<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-01-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001783317</issuerCik>
        <issuerName>McAfee Corp.</issuerName>
        <issuerTradingSymbol>MCFE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001392404</rptOwnerCik>
            <rptOwnerName>Kornegay Christine Beseda</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6220 AMERICA CENTER DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN JOSE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95002</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Accounting Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value></value>
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        <derivativeTransaction>
            <securityTitle>
                <value>Class A Stock Option</value>
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                <value></value>
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                <transactionShares>
                    <value>22014</value>
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                    <value>0.00</value>
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                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
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                    <value>22014</value>
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                    <value>22014</value>
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    <footnotes>
        <footnote id="F1">Reflects shares of the Issuer's Class A common stock received upon vesting of an equal number of restricted stock units (&quot;RSUs&quot;).</footnote>
        <footnote id="F2">Reflects withholding of shares of the Issuer's Class A common stock upon vesting of RSUs to satisfy the Reporting Person's tax withholding obligation, based on the last reported sale price of the Issuer's Class A common stock on January 15, 2021.</footnote>
        <footnote id="F3">Each RSU represents a contingent right to receive one share of the Issuer's Class A common stock.</footnote>
        <footnote id="F4">The remaining RSUs vest in seven equal quarterly installments beginning on March 31, 2021.</footnote>
        <footnote id="F5">The remaining RSUs vest in seven equal quarterly installments beginning on March 31, 2021.</footnote>
        <footnote id="F6">The remaining RSUs vest in thirteen equal quarterly installments beginning on March 31, 2021.</footnote>
        <footnote id="F7">The remaining RSUs vest in nine equal quarterly installments beginning on March 31, 2021.</footnote>
        <footnote id="F8">On January 20, 2021, the Issuer amended the terms of previously granted performance-based RSUs. As amended, these RSUs vest (i) in full upon the satisfaction of certain performance criteria related returns achieved by certain of the Issuer's stockholders (inclusive of dividends) or (ii) if such performance criteria have not been satisfied prior thereto, in three equal annual installments beginning on October 21, 2021.</footnote>
        <footnote id="F9">On January 20, 2021, the Issuer amended the terms of previously granted performance-based options to purchase the Issuer's Class A common stock. As amended, these options vest (i) in full upon the satisfaction of certain performance criteria related returns achieved by certain of the Issuer's stockholders (inclusive of dividends) or (ii) if such performance criteria have not been satisfied prior thereto, in three equal annual installments beginning on October 21, 2021.</footnote>
    </footnotes>

    <remarks>Mr. Ross is signing on behalf of the Reporting Person pursuant to a Limited Power of Attorney dated October 21 2020, which was previously filed with the Securities and Exchange Commission.</remarks>

    <ownerSignature>
        <signatureName>/s/ Jared Ross, as Attorney-in-Fact</signatureName>
        <signatureDate>2021-01-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
