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Can’t install or shutdown or anything after downloading and starting the update... message is up for less than a second... to continue the shutdown quit Install MacOS Big Sur...

Anyone else know how to “quit the install”?


MacBook Pro 15″, macOS 10.15

Posted on Dec 18, 2020 11:54 AM

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Question marked as Top-ranking reply

Posted on Dec 18, 2020 12:59 PM

Try holding option key at power on.

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Can’t install or shutdown or anything after downloading and starting the update... message is up for less than a second... to continue the shutdown quit Install MacOS Big Sur...

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