macOS 26.7 (security, no enterprise, no developer, full installer):

This update provides important security fixes and is recommended for all users.

macOS 15.8 (security, full installer):

This update provides important security fixes and is recommended for all users.

See also: MacRumors, Mr. Macintosh, and Howard Oakley.

Previously:

• macOS 27 Golden Gate
• macOS 26.6.2
• macOS 15.7.9 and 14.8.9

Update (2026-09-22): Wade Tregaskis:

Yesterday I tried doing the 15.8 update (from 15.7.9) inside one of those VMs. It hanged, midway through the post-reboot install process. I had to ‘power-cycle’ the VM. Which booted it back into 15.7.9, except… shockingly slow. Like, I can watch the individual elements of the GUI render like it’s the 1980s again.

I eventually figured out that my 16 GiB VM could only “see” 1.75 GiB of RAM, and was therefore swapping all to hell.

[…]

In hindsight, the simplest solution might be – I have not tested it – to just run:

sudo nvram -d boot-args

That should clear the boot args, eliminating whatever insane stupidity Apple’s updater enacted there.

me22 (via david_blanchard):

Apple’s camera raw support seems to be broken here since updating to macOS 15.8.0.

Update (2026-09-23): Brian Webster:

I can corroborate there being a problem with RAW files on macOS 15.8. I’ve had two customers run into problems trying to copy RAW images with PowerPhotos, it appears that photolibraryd ends up deadlocked somewhere in the RawCamera library, and you have to kill it to get things moving again.

Update (2026-09-25): Norbert M. Doerner:

Apple was able to completely break the essential RawCamera system framework, and macOS 15.8 is now unable to use Nikon, Canon, and other RAW files anymore.

[…]

Spotlight will hang for CR2, NEF, or DNG and other files, Preview.app can no longer open RAW files and will hang forever. The Finder can no longer display thumbnails of RAW files and will hang trying to do so. As will all other applications that can open these RAW files directly, like Apples own Pages.