T2 Chip - Startup Utility - booting off of an external drive

For those who might have the occasion to want to boot off an external drive this will be helpful

Very helpful, thanks!

Any tips for booting into Safe Mode?
My iMac Pro completely ignores the shift key. I even tried an Apple-brand keyboard.

Do you have a Firmware password? If so it won’t boot into Safe Mode, IIRC.

Yes, I do.
I’ll give that a try.

Depending on the changes you make, Monterey will send you back to this screen when you invoke System Preferences > Erase All Content and Settings.