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Level 1

4 points

Startup Security Utility

Hi. I'm trying to boor my computer MacBook Pro 2022 M1 from an old external drive running High Sierra. When I try to change the Security Policy from Restore Mode, I always get this error:

"Invalid Disk: Failed to gather policy information for the selected disk"

Any suggestion? Thanx

MacBook Pro Apple Silicon

Posted on Jul 4, 2022 4:08 PM

Best reply

dialabrain

Level 10

122,549 points

Posted on Jul 4, 2022 4:13 PM

High Sierra will not run on an M1 Mac. Big Sur was the earliest version of macOS that would run.

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Startup Security Utility

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