repair permissions in Big Sur on startup drive
suddenly I do not have permission to write to my startup drive in Big Sur 11.1.
iMac 27" 2TB fusion drive 2019 5K retina, Big Sur 11.1
machine/OS was OK a few hours ago. I have tried Disk Utility (does not work like a few years ago), I have restarted, I have just about exhausted my options.
I have tried to add my self in various ways to the permission list, no joy. I have tried to add administrators, no joy. System says R &W permission, but not me -- I even tried to grant everyone R&W permission. no joy. But I can start up my computer.
Don't know what to do (except use Time Machine).
Help, please. Phil Richardson
How
iMac 27″, macOS 11.1