Apple released the macOS 27 "Golden Gate" beta in August 2026, which alters how the boot picker and Startup Disk detect valid operating system volumes. This update causes Asahi Linux partitions to become invisible and unbootable from the boot menu on affected Macs [1, 2].
Despite being hidden, the Asahi Linux partitions remain physically intact without any data loss, according to reports [1, 2]. Users upgrading to macOS 27 beta who lose access to Asahi Linux must boot back into macOS 26 or an earlier version to restore access to their Linux environment [1, 2].
The Asahi Linux project filed a bug report with Apple under the number FB22994760 to address the issue shortly after the beta's release [1, 2]. In response, the Asahi Linux installer was updated to block installations on macOS 27, preventing new installations on the incompatible beta environment [1].
Looking ahead, Linux kernel 7.2 is expected to support booting on Apple’s upcoming M3 devices, though this functionality is not yet ready for general users [2].
For now, users affected by the macOS 27 beta’s incompatibility with Asahi Linux must revert to earlier macOS versions to maintain access to their Linux partitions.