Updating to macOS Monterey not working
When I try to update my OS from Catalina to Monterey my Mac desktop goes into a restarting spiral and I have to revert back to Catalina. I have an iMac 27in Late 2015 model. Any suggestions?
Earlier Mac models
Run the third party app EtreCheck and post the complete report here so we can examine it for possible clues.
Also, run the third party app DriveDx (free trial period) to check the health of the internal drive(s). Post the complete DriveDx text report for the internal drive(s) using the "Additional Text" icon which looks like a piece of paper on the forum editing toolbar.