I’ve been trying to download the macOS Monterey beta, so I can install it on a volume on my MBA (M1). I’ve tried multiple times, to no avail.
My machine sees the Monterey beta just fine, but when I try to download it using system preferences, the download gets to 11.73 GB of 11.73 GB, sits for a bit, then aborts with this not very helpful dialog:
Installation failed. An error occurred while installing the selected updates.
When I hop into iTerm and run
softwareupdate --fetch-full-installer, all initially looks good. I see
Scanning for com.apple.InstallAssistant.Seed.macOS12Seed1 installer, and I then watch the installation get to 90%, and pause. After the pause, I get this even less helpful message:
Install failed with error: Installation failed
I’m currently running the 11.5 beta (20G5052c), which is what the MBA first decided to update to when I enrolled it in the beta yesterday.
Has anyone else encountered anything like this? Any ideas would be most welcome!