Mounting a FileVault-encrypted backup on another Mac

[jmsgwd]

Originally Posted by dnanian

I have no idea, unfortunately. We're not doing anything weird with the drive, and don't interact directly with encryption at all.

OK - interesting. I have a vague memory of being able to to this, but it was a long time ago - well before APFS.

I'm wondering if perhaps Apple changed something, and recovery keys are now cryptographically bound to the particular Mac they were generated on, and (by design) will not work if the same volume is mounted from a different Mac.