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Apple Computing Products:
macOS - Operating System
Recovering data and the Macintosh HD - Data volume
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<blockquote data-quote="MacInWin" data-source="post: 1877124" data-attributes="member: 396914"><p>I would bet that when you change the view to "Show All Devices" another Volume will show up. Probably named Macintosh HD. And I would also venture to say that the system installed on the Mac is Big Sur. What Apple changed in Big Sur from Catalina was that it increased security on the Macintosh HD Volume and also encrypted it so that only the system can read/write to it. Catalina knows nothing of that, so it won't even mount the Volume in the Container. It *may not* even show it, but I'm betting it will, but it will be greyed out and unavailable to you with any tool or password. The encryption on the Macintosh HD is not the FileVault, as now FileVault only applies to Macintosh HD - Data Volume. So the customer can give you nothing to unlock that Macintosh HD volume. It's all up to Apple. </p><p></p><p>As for the not booting issue, why not boot into Recovery Mode and reinstall the OS? That should work, and also should leave the original user data intact. I'd make a backup, of course, as anything can go wrong, but a reinstall over the un-bootable data should work just fine.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1877124, member: 396914"] I would bet that when you change the view to "Show All Devices" another Volume will show up. Probably named Macintosh HD. And I would also venture to say that the system installed on the Mac is Big Sur. What Apple changed in Big Sur from Catalina was that it increased security on the Macintosh HD Volume and also encrypted it so that only the system can read/write to it. Catalina knows nothing of that, so it won't even mount the Volume in the Container. It *may not* even show it, but I'm betting it will, but it will be greyed out and unavailable to you with any tool or password. The encryption on the Macintosh HD is not the FileVault, as now FileVault only applies to Macintosh HD - Data Volume. So the customer can give you nothing to unlock that Macintosh HD volume. It's all up to Apple. As for the not booting issue, why not boot into Recovery Mode and reinstall the OS? That should work, and also should leave the original user data intact. I'd make a backup, of course, as anything can go wrong, but a reinstall over the un-bootable data should work just fine. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
Recovering data and the Macintosh HD - Data volume
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