How to reinstall MacOS when the reboot utility says it needs an internet connection
iCloud on my 2018 iMac appears to be corrupt. I tried to turn it off, planning to turn it back on after a fresh boot, but I get a message that I must wait to sync two files, followed by an option to go forward anyhow—but iCloud remains installed and faulty. I opted to just reinstall MacOS to start clean. But when I get into disc utility and select “reinstall MacOS,” I’m told I need an internet connection (I assume WiFi is not available in the reboot state.) any thoughts on how to dig out and start fresh?