Everything Freezing
It seems after several years of owning each iMac it begins to freeze up, forcing me to buy a new system. I currently have the system in the screen shot below. It is almost six years old. At this point, literally every program freezes up. This started a couple of weeks ago. I need to force quit every program and most often have to force restart the computer using the power switch. After restarting, I will sometimes reset the PRAM. It will take about 15 minutes to reach the desktop in an unfrozen state where I can actually use it. If I walk away from the computer for a while, leaving my programs open as I always have (browsers, Quicken, Apple Mail), everything is frozen again. I have to go through the routine of force quitting, restarting, etc.
I have run Malware Bites and everything comes up clean. After reading some help pages on this site, I also downloaded and ran EtreCheckPro but did not find anything significant.
What are my best options at this point? I do run Time Machine so should have everything backed up in the event I need to reinstall system software. Are there any less invasive options I can implement to try to get the system running smoothly again?
I do notice that is an update I need to install to move from 13.6.3 to 13.6.4 which I am about to do.
iMac 27″ 5K