Disabling Startup Mode Security Mac With T2 Chip

[picaman]

I have a new Mac mini with the T2 chip and I’ve been doing a daily backup to an external drive using the latest version of Super Duper. Trying to understand this - is my backup unusable unless I go into recovery mode and change the settings?

[dnanian]

You can't boot from an external device unless you turn on the ability in recovery. The backup itself is fine, but the system won't allow boot until you allow it.

[picaman]

Originally Posted by dnanian

You can't boot from an external device unless you turn on the ability in recovery. The backup itself is fine, but the system won't allow boot until you allow it.

OK so if I don’t allow it, in the event of a internal disk crash I could still restore to a new disk/computer as long as it had an OS on it?

[dnanian]

You could point to it during first boot when prompted to 'restore' and have it bring the data in, yes.

[picaman]

Ok that makes sense. Thanks for your time. For my needs to allow external boot seems to partially defeat the purpose of the T2 security.

[dnanian]

Not really. T2 has nothing to do with turning off external boot - that's just basically a setting that could be present in any BIOS.