Spinning beachball
I get the spinning beachball everyday minutes after I open the iMac. Often right after I open something. Force quit does not open. Have to cut power to start over. Usually that solves the problem, whatever it is
Question marked as
Try booting to Safe Mode. That boot up takes minutes and clears caches and other things that may resolve your problem.
How to use safe mode on your Mac - Apple Support
A lot of times just boot to Safe Mode followed by normal boot resolves problems.