Monterey install asks for authorization for volume by setting it as start-up Disk??

Has anyone tried to install Monterey on a M1 MBP 13" and received the "you must provide auth for this volume by setting it as install disk"? The internal drive IS the start-up disk. No other disks are present, the internal drive shows as the start-up drive... I'm stumped.


Posted on Oct 27, 2021 7:19 AM

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Posted on Oct 27, 2021 8:49 AM

Thanks for the response Grant.


No directions were provided with the download of Monterey. Appreciate your link tho not applicable to the M1 - , for an M1 the instructions for recovery-mode are here: https://support.apple.com/guide/mac-help/macos-recovery-a-mac-apple-silicon-mchl82829c17/12.0/mac/12.0#mchl5abfbb29

Appears I can now install Monterey in Recovery-mode (vs in the desktop of BigSur as implied by the download and install button).


I feel like Apple could do a better job of including these critical tidbits of info. up front. For a platform that is supposed to be ease-of-use friendly this reminds me of installing Windows drivers. Nothing like 1-2 steps being left out and for the user to discover.

Anyway, seems to be installing now via recovery mode. Thanks for your assist.


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Question marked as Top-ranking reply

Oct 27, 2021 8:49 AM in response to Grant Bennet-Alder

Thanks for the response Grant.


No directions were provided with the download of Monterey. Appreciate your link tho not applicable to the M1 - , for an M1 the instructions for recovery-mode are here: https://support.apple.com/guide/mac-help/macos-recovery-a-mac-apple-silicon-mchl82829c17/12.0/mac/12.0#mchl5abfbb29

Appears I can now install Monterey in Recovery-mode (vs in the desktop of BigSur as implied by the download and install button).


I feel like Apple could do a better job of including these critical tidbits of info. up front. For a platform that is supposed to be ease-of-use friendly this reminds me of installing Windows drivers. Nothing like 1-2 steps being left out and for the user to discover.

Anyway, seems to be installing now via recovery mode. Thanks for your assist.


Oct 27, 2021 12:57 PM in response to Fraser Campbell

Great call-out. I did not try this as previously the installer asked for an admin account if it was required, before proceeding.

In this case I was just left with a somewhat cryptic message about start-up disk.

Now that I think about it, I believe this is the first major M1 OS upgrade so this may be the way it goes from here on out. Will try to login from an admin account next time before going the recovery route.


At least I learned something and you guys made it virtually painless. ;) Thanks!

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Monterey install asks for authorization for volume by setting it as start-up Disk??

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