Apple today rolled out macOS Sequoia 15.6, the sixth update to macOS 15 (Sequoia), first released on September 16, 2024. Coming over two months after version 15.5, this release is focused squarely on improving system stability and security rather than adding new features. The update is available for free on all Macs compatible with Sequoia via System Settings > Software Update.
What’s New in macOS 15.6
The official release notes emphasize important fixes and behind‑the‑scenes improvements:
Fixed: An issue in Finder and Apple Configurator that could prevent some devices from restoring from DFU mode, potentially bricking them.
In addition, approximately 81 security vulnerabilities across system components – including iBoot and Safari – are addressed in this update. Apple does not report any of these issues as having been actively exploited.
For Apple silicon Macs, the build is labelled 24G84, Safari updates to version 18.6 (20621.3.11.11.3), and iBoot updates to version 11881.140.96. The download for Apple‑silicon machines is around 2.8 GB.
macOS Sequoia 15.6 compatible Macs
The same Macs that support macOS Sequoia can install this update:
- iMac (2019 and later)
- iMac Pro (2017 and later)
- MacBook Air (2020 and later)
- MacBook Pro (2018 and later)
- Mac mini (2018 and later)
- Mac Pro (2019 and later)
- Mac Studio (all models)
How to Install macOS Sequoia 15.6
- Open System Settings > Software Update
- Connect your Mac to a reliable power source and internet
- Click Update Now to download and install
- Once the Mac restarts, verify the build number 24G84 to confirm the update was installed
macOS Sequoia 15.6 is expected to be one of the final updates ahead of the public release of macOS 16 this fall, which will be called macOS Tahoe. Apple has already previewed several new features in the upcoming version, including a redesigned Liquid Glass interface, deeper integration with Apple Intelligence, and a new iPhone Mirroring experience for Mac. The update is currently in beta testing with developers and public beta testers and will be available to all users this fall.
