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<blockquote data-quote="Lifeisabeach" data-source="post: 1884207" data-attributes="member: 38864">I'm able to choose my bootable clone as a startup drive from the firmware. If Apple hadn't intended for that to be an option on the Apple Silicon platform, that would be one epic oversight, especially being over 6 months since launch of the platform.What I can tell you is that when I was trying to install Big Sur clean to the external drive from the Recovery Utility in the firmware, I was required to provide an admin password for a user on the existing install first. So I think that means one can't just take someone else's Mac; install macOS to an external; then wipe the internal. That &quot;shouldn't&quot; be possible. Now I don't know what would happen if you took a bootable drive from a different Mac that was otherwise compatible and tried to boot off of that. There is a Startup Security Utility that should prevent it, or possibly allow it if the owner had opted to use &quot;reduced&quot; security.</blockquote>

[QUOTE="Lifeisabeach, post: 1884207, member: 38864"] I'm able to choose my bootable clone as a startup drive from the firmware. If Apple hadn't intended for that to be an option on the Apple Silicon platform, that would be one epic oversight, especially being over 6 months since launch of the platform. What I can tell you is that when I was trying to install Big Sur clean to the external drive from the Recovery Utility in the firmware, I was required to provide an admin password for a user on the existing install first. So I think that means one can't just take someone else's Mac; install macOS to an external; then wipe the internal. That "shouldn't" be possible. Now I don't know what would happen if you took a bootable drive from a different Mac that was otherwise compatible and tried to boot off of that. There is a Startup Security Utility that should prevent it, or possibly allow it if the owner had opted to use "reduced" security. [/QUOTE]

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