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Reply to Can't install macOS Monterey beta on M1 external drive
In my case, I tried to install Monterey beta into a volume created in the Big Sur's APFS conainer. https://gyazo.com/2f0275ed0d7b4f120a4d8cce8a854e99 At the time of restarting, it failed (waiting more than few miniutes after quiting visible apps). So I restarted myself. After restarting, Big Sur is booted. I tried to select the Monterey volume as the start up disk (System Preferences -> Startup Disk). I got an error: An error occurred while setting “Monterey” as the startup disk: The operation couldn’t be completed. (SDErrorDomain error 108.) https://gyazo.com/427104df6897d5adc65d3222c2c95dfb
Jun ’21