If you ever use a T2 Mac with the Startup Security Utility in the Recover Partition to control external booting and other boot parameters, this is for you.
If you clone the original installation to another volume, boot off that, and erase the original, the token to use this utility is gone. You...
Got a MacBook Pro and just wasted 1 1/2 days. I think the T2 is presuming theft and locking out boot after all restores or installs. After trying 1/2 day yesterday I wasted a major part of the day waiting for a Genius who was not trained on the new model and had no tools to diagnose T2 issues...