Fails to boot since 4.20~rc1 on various 2019-2020 Mac (Grub doesn't load)
Original report
All earlier Tails versions I've ever used boot on the 2019 16-inch MacBook Pro (Intel).
But 4.20~rc1 doesn't. Grub doesn't load, therefore Tails never loads. Just a black screen after selecting it from the Apple EFI boot menu.
I've noticed this since trying some nightly IMG/ISO's a few days ago.
Something must have changed in Tails boot/Grub files since 4.19? (even since the defunct 4.19~rc1 which also boots fine?)
Analysis
Copying EFI/BOOT/BOOTX64.EFI from 4.19 to the same location on the 4.20~rc1 USB stick fixes the bug ⇒ the problem was introduced by a shim upgrade.
Affected computers
- 2019 16-inch MacBook Pro 16,1
- iMac 2020 (#18565 (closed))
- MacBook Pro 2020 13" (#18567 (closed))
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information