Apple
macOS
TLDR: macOS 27 beta changes boot detection, hiding Asahi partitions on Apple Silicon and preventing Linux booting. Asahi advises delaying upgrades.
Key Takeaways:
- Asahi Linux relies on Apple Silicon boot volumes showing up in the boot picker and Startup Disk.
- macOS 27 beta changed detection, making the Asahi partition disappear and blocking Linux booting for now.
- Asahi says the partition remains, but support may be withheld unless stable macOS 26 is also installed.
Linux on Apple Silicon already runs on the edge of what Apple exposes. This beta shows how quickly visibility can vanish, even when the data stays put.
Linux on Apple Silicon already runs on the edge of what Apple exposes. This beta shows how quickly visibility can vanish, even when the data stays put.
Q&A
What would a fix need to do for Asahi users to boot again?
It would need to restore correct OS boot volume detection in macOS 27 for existing Asahi partitions, so the boot picker and Startup Disk again recognize them.
Why might Apple not be trying to block Linux, even if the effect is real?
The Asahi team calls the behavior potentially accidental because macOS 27 is still in beta, suggesting a detection logic change rather than an intentional block.
If the Asahi partition is still on disk, why does boot fail anyway?
The partition disappearing from macOS boot tooling prevents selecting it at startup, so the system never reaches Asahi Linux even though the data remains.
How should users reduce risk when testing betas on dual boot setups?
They should keep a stable macOS 26 fallback installed on another volume and avoid relying on a single boot path.
Could this setback slow downstream releases like Fedora Asahi Remix?
It could delay testing and onboarding if fewer users can boot after updating, but the project already points to installer safeguards and ongoing progress.
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