Monterey installer won't accept my internal drive as startup disk

Pyrotex7 wrote:

I’ve been trying to install macOS Monterey via the normal installer, downloaded from system preferences, on a M1 Mac Mini

The download worked fine, but after opening the installer and accepting the license agreement, it stops me when selecting a disk with this message “You must provide authorization for this volume by setting it as your startup disk. You can relaunch the installer after authorization has been provided.” This seems like a normal message, except for the fact that it is my startup disk, which I have made sure of by checking system preferences, and then trying to reselect it as my drive and restarting. It also is my internal drive, an official Apple SSD, the drive I am currently running macOS on, and the only drive connected to my computer. This is where I’m stuck.

So, I have no idea how to fix this. My drive seems to be in fine condition, and the installer is completely contradicting system preferences at this point. I’ve tried deleting it and reinstalling it, restarting the computer, and I also installed a couple Big Sur updates and still no change.

Here’s some screenshots...

https://discussions.apple.com/content/attachment/e7bf61ec-f7a7-4748-bbd9-775c54a4c1e9

https://discussions.apple.com/content/attachment/107db2bf-683e-4921-a2a6-f1df4fb81ef7

I would highly appreciate any ideas or solutions anyone can provide.

Can you verify you unlock the padlock and then select the Macintosh HD

Pyrotex7 wrote:

I finally fixed it, for some reason it worked under an admin user, just not under a normal user.

No surprise there..