I guess I'll try a Mojave upgrade to start. Would love to go to Big Sur in one jump, but I'm afraid of all the upgrade issues, so a step at a time may be the way to go. I purchased my iMac in 2018 ...
The trouble started after I installed a full version of Band In The Box. That app has no issues, but did crash yesterday for the first time. I'm guessing BIAB and Finale use some similar things. mI...