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macOS 27 does not support CoreStorage volumes

93 points • by colejohnson66 • yesterday at 7:27 PM • 57 comments • view on HN

Comments

Marsymars • yesterday at 10:35 PM

Well, heck.

I posted ~7 months ago about my decision to use HFS+ for backups, and had a couple skeptical replies. (https://news.ycombinator.com/item?id=47317123)

I guess I misjudged Apple's commitment to support HFS+ long-term.

It now seems like there's no real native way of doing encrypted backups to HDDs on macOS (APFS not really recommended for HDDs)... the options are either encrypted Time Machine to a network location, or a third-party tool.

Guess I'll figure out SuperDuper or Carbon Copy.

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someonehere • yesterday at 11:32 PM

With macOS 27, I don't know who Apple is trying to outdo?. 27 has been a total disaster for me and my setup at home.

Back when there was a little more rivalry between Microsoft and Apple, Apple would come up with these really cool things to showcase the operating system and make lives easier. Now, I don't know what it is they're trying to prove with this operating system. I also hate the fact that they skinned the whole operating system around a failed hardware product.

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AceJohnny2 • today at 12:16 AM

FWIW, this is listed as deprecated in the Release Notes:

https://developer.apple.com/documentation/macos-release-note... (Search for CoreStorage; their fragment links are hilariously broken)

The premier 3rd Party technical blog Eclectic Light talked about it in June: https://eclecticlight.co/2026/06/17/what-to-do-with-your-enc...

I can't immediately find prior warnings that this was coming.

The following technical note from July 22nd says Encrypted HFS+ Volumes won't be supported in macOS *28*, so this seems a bit early... https://support.apple.com/en-us/125615

hmartin • yesterday at 9:33 PM

Also dropped support for FireWire drives, as I just found out the hard way.

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exabrial • yesterday at 9:29 PM

MacOs 27 is a disaster. All of the sudden, I have 35% of a computer left to do any kind of work.

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varispeed • yesterday at 9:46 PM

I upgraded and this system is a dumpster fire. Lags, random crashes, performance issues, random CPU spikes...

jon128 • yesterday at 9:34 PM

[flagged]

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throwaway27448 • yesterday at 9:26 PM

For those of you who have never heard of this, it's macos's LVM. Why they didn't just refer to it as LVM is beyond me.

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whatever1 • yesterday at 10:56 PM

Why do people try to force macOS things that it does not like to do? macOS does not like not apple hardware, period.

For backups use a NAS. You can find from completely plug and play options to bring your own machine ones.