The last time I installed an OS update, I thought I could start the update, go away for a while, and it would be done when I returned. But when I got home I found it waiting for me to tell it to restart the computer to install the update, and then I had to wait for that to complete.
This weekend I plan on upgrading from Big Sur to Monterey (giving in to the nagging badge on the System Prefs dock icon), and I'm hoping there's a way to do what I tried. Is there a way to configure Software Update so that it will restart automatically instead of waiting for me to answer the prompt? That way I can start it, go to the gym, and (assuming the upgrade was successful) find the Mac ready to use when I return.