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Asahi LinuxonMastodon1d ago
PSA for #AsahiLinux users: Do NOT upgrade to macOS 27 Golden Gate!
Apple has changed how the boot picker and Startup Disk applications detect valid OS boot volumes. When using either from macOS 27, your Asahi partition will not be visible! We believe this to be a bug, and have filed a report (FB22994760).
If you have already upgraded to the beta and noticed that your Asahi partition has disappeared, do not stress. Your Asahi partition is still there, and you have not lost any data.
If you have already upgraded to macOS 27 and have a secondary installation of macOS 26 or below, set this as your default Startup Disk to restore access to Asahi. The Apple Silicon boot picker is a full-fat macOS app running in the default boot volume's recovery environment, so its behaviour is dependent on the default boot volume's macOS version.
If you insist on trying out macOS 27 as soon as possible, please ensure you install a secondary copy of macOS 26 first, or install macOS 27 itself on a secondary volume. We will not support users who have installed the macOS 27 beta without making contingency or rollback plans (such as ensuring at least one stable macOS version is installed).
We have patched the Asahi Installer to prevent it from running on macOS 27 until we have some idea of what's going on. It will print a version of this message and then exit if you try to run it from the macOS 27 beta.
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Accuracy85%
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Tone88%
Analysis Summary
Asahi Linux developers are warning users not to upgrade to the unreleased macOS 27 beta because Apple changed how the boot picker detects valid OS volumes, making Asahi partitions invisible — though the data isn't actually lost. The project has patched its installer to block installation on macOS 27 until the issue is resolved, and users who've already upgraded can restore access by setting a secondary macOS 26 installation as the default startup disk. This is a legitimate technical compatibility issue for the minority of users running Asahi Linux on Apple Silicon Macs, and the post provides clear workarounds.
Claims Analysis (4)
“Apple has changed how the boot picker and Startup Disk applications detect valid OS boot volumes in macOS 27 Golden Gate”
Technical claim about unreleased beta software. No independent confirmation in search results, but Asahi Linux is authoritative source on Asahi compatibility.
“When using macOS 27 boot picker or Startup Disk application, Asahi partition will not be visible”
Specific bug report from Asahi developers. Filed as Apple bug FB22994760. Not independently verified in public sources but consistent with technical credibility.
“The Apple Silicon boot picker is a full-fat macOS app running in the default boot volume's recovery environment”
Technical analysis/explanation of system behavior. Asahi developers provide this as analysis of root cause, not a falsifiable claim.
“Asahi Installer has been patched to prevent it from running on macOS 27 until issue is resolved”
Direct statement from Asahi project about their own software. Very high social corroboration (677 engagements, 13 instances) confirms this was communicated.
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