Mac M1 fails to upgrade to macOS 27 Beta

Community Apple Developers
mc314159 OP
Created 8h
Replies 1
Boosts 0
Views 32
Participants 2

I have tried to upgrade to macOS 27 Beta from 26.1 Beta on my MacBook Air M1, but it just doesn't work.

I've tried:

  1. Software update
  2. Installer
  3. Terminal

both in normal boot and safe boot. Six attempts, none worked.

Here are some screenshots:

P lease help as I'm freaking out. Thanks in advance!

Specs:

OS: macOS 26.1 Beta (25B5057f)

Chip: Apple Silicon M1

RAM: 8GB

Replies  1
Boosts  0
Views  32
Participants  2
fbronner OP
5h

This suggestion about recovery mode and full security let me install it.

https://www.reddit.com/r/MacOSBeta/comments/1u0jrux/failed_to_install_macos_27_beta/

Mac M1 fails to upgrade to macOS 27 Beta
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