DAMN! I hate this new System/Data setup & lockdown. It can't be overcome by disabling SIP & sudo combined and is a major PIA!!!
Imagine my surprise when I attempted to boot my new 2018 Mac mini from a CCC clone only to be told it could not be booted from an external drive! It turns out that is a T2 chip thing that can only be changed when booted from the Recovery Drive and for some changes you also have to be logged onto the internet. In the process of troubleshooting a couple of issues with the new Mac mini I am booting into the Recovery Drive several times a day just to tweak the security settings. It is annoying, but not nearly as annoying as getting hacked would be. Security, like freedom, isn’t free.
