Not exactly, the bootpicker just won’t show partitions that are not flagged as bootable. This is a departure from previous versions, that would check to see whether partitions were bootable without looking at the flag, and took a little bit of investigating to figure out this undocumented behavior, but it is an easy fix:
Apple will fight it with everything they can. Latest MacOS27 hides linux partitions from the bootpicker so it is blocked in firmware.
If Apple didn’t want to allow Linux to boot they would have removed the functionality they specifically put into the firmware to allow Linux to boot.
Not exactly, the bootpicker just won’t show partitions that are not flagged as bootable. This is a departure from previous versions, that would check to see whether partitions were bootable without looking at the flag, and took a little bit of investigating to figure out this undocumented behavior, but it is an easy fix:
https://asahilinux.org/2026/06/progress-report-7-1/
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