When installing Monterey on an M1 Mac, you get an error message: "You must provide authorisation for this volume by setting it as your startup disk."
You must run the upgrade as an admin user. Temporarily providing admin credentials sometimes doesn't work. Try relaunching the installer after authorisation has been provided. Or install in recovery mode.
I usually write a blog post about once a week. The latest post can be viewed here: Think for Yourself: In the end, everything is just an opinion. Be skeptical, and think for yourself! (posted 2026-04-25 at 21:12:02). I do podcasts too! You can listen to my latest podcast, here: OJB's Podcast 2026-04-14 How Far is that Star?: How would we really know how big the universe is?