Apple (release notes, security, enterprise, developer, full installer, IPSW):

Explore what’s new for macOS 27.

The page is designed in an annoying way that requires sideways scrolling, and there doesn’t seem to be a PDF list of the new features like in previous years.

See also:

• Jason Snell
• Juli Clover
• Marcus Mendes
• William Gallagher
• Mr. Macintosh
• Reddit

Jeff Johnson:

There’s also a DEPRECATION NOTICE at the top of the man page that lists the diskutil replacements for hdiutil subcommands.

Patrick Wardle:

Fixed: launchd no longer supports loading launchd property list files with the quarantine extended attribute.

Dave Nanian:

[Even] though a bootable backup is properly configured to boot, they aren’t showing up as choices in either the startup disk preference pane or the startup picker. (FB24210103, reported quite a while ago, Apple friends.)

Previously:

• Golden Gate Release Candidate
• Preparing to Update to Golden Gate
• macOS 27 Public Beta
• Glow Leopard
• macOS 27 Golden Gate Announced
• macOS Tahoe 26