The "Turn On McAfee Total Protection" pop-up is a push notification that uses fake alerts stating that your device is under attack or infected to trick you
Pop up scam? : r/mac
Pop Ups saying my computer has viruses - Microsoft Community
How to turn off McAfee Pop ups - Apple Community
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How to Spot a Fake Virus Alert and Remove It
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Solved: McAfee Support Community - Annoying McAfee Popup Spam - How to Disable? - McAfee Support Community
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