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I think I screwed up!
Posted by: vicrock
Date: March 08, 2022 08:23PM
I'm prepping a 2019 MBP for sale - followed the instructions on the Apple site, all the steps - but since it was running Catalina, I decided to download and install Monterey - and now I'm getting the dreaded ??

I have an external drive with both a CCC and time machine backup - on separate partitions, but when I try to boot from it, I'm getting a message that says the security preferences don't allow an external drive boot.

Any way to get out of this pickle??
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Re: I think I screwed up!
Posted by: btfc
Date: March 08, 2022 08:29PM
‘ About Startup Security Utility on a Mac with the Apple T2 Security Chip ‘


[support.apple.com]
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Re: I think I screwed up!
Posted by: vicrock
Date: March 09, 2022 05:15PM
Thanks btfc - that did the trick. It took a LONG time and several restarts, but all seems well now.
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