I have a 2017 21.5" iMac running 10.15.7 MacOS. When I go to update the Mac OS in System Preferences, it gives me the spinning ball of death.
I have also tried going to Apple support and clicking on the OS update which takes me to the app store- which sends me back to Software Update in System Preferences.
I have plenty of space (470GB free on a 1TB fusion drive).
I have disconnected external drives.
Suggestions?
Thanks.
Third party AV-ware, Ad-ware, Optimizers, Utilities and VNC’s can block macOS updates and upgrades.
Startup your iMac in Safe Mode and see if it will Update.
Start up your Mac in safe mode - Apple Support
Another obstacle could be week or slow Internet. If you have Internet issues, try moving your iMac closer to your router or use an Ethernet cable if possible.
Use Safe Mode, it prevents the third party-ware from loading and does a disk check.
Thanks- will try and stop Ad-ware. I have gig ethernet, speed is not a problem.
That did it- greatly appreciate your help!
You're welcome, glad to hear that solved the problem.
I have 2017iMac running Catalina- it won't upgrade to Monterey
