Golden Gate Does Not Actually Support CoreStorage
macOS 15 Sequoia had a hard time with CoreStorage and HFS+ volumes, since it deprecated both technologies and callously crippled some important tools for working with them, but nonetheless it mostly still worked.
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Not only does Golden Gate just not support CoreStorage or HFS+ volumes, out of the box you can’t do anything with them – can’t mount them, can’t convert them to APFS, can’t even erase them. It renders your expensive storage hardware completely useless.
Worse, macOS 27 puts up a misleading dialog, upon boot, saying that macOS 28 (the next version) won’t support these volumes. I have no idea what Apple’s doing or thinking. Maybe it’s all just an embarrassing misunderstanding – the file system team told the notifications team that CoreStorage & HFS support is gone, and typoed the version number as 28 rather than 27?
Apple also wrote an article this summer saying that CoreStorage volumes would be supported in macOS 27 and that unencrypted HFS+ would be supported in macOS 28.
Tregaskis says that macOS 28 does not support “CoreStorage or HFS+,” but in my testing plain HFS+ volumes do work.
Previously:
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Interesting - I had absolutely no luck getting any encrypted HFS+ drive to work… when you say “plain”, do you mean unencrypted (and presumably thus non-CoreStorage)? I didn’t test that case - to be honest it didn’t really cross my mind till just now (I’ve been using encrypted disks exclusively - camera memory cards notwithstanding - ever since FileVault 2 came out).
It could be that the problem is only with CoreStorage, not the HFS layer. I’m not sure how helpful that is in practice, but nonetheless I’d like to correct my post, if so.
