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How do I get the security update for High Sierra 10.13.6?

MacBook Air 13″, macOS 10.13

Posted on Jan 17, 2022 1:05 PM

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Posted on Jan 17, 2022 2:13 PM

Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes.

Try the standalone Security Update 2020-005 or 2020-006 (High Sierra) in Safe Mode...

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