27" 5K Retina Display iMac (Late 2015) Screen glitching and crashing with no replicatable cause.
Hi, I've had this problem for years and have searched for a fix but can't seem to find the cause of this issue.
My iMac screen will glitch out and the computer will crash. This happens fairly often, maybe once or twice in a session even whilst using fairly low-demand applications such as Chrome, Word and Teams. I find I can't replicate the issue on purpose.
Sometimes the screen will glitch and then recover and be okay. Sometimes it won't happen for weeks but eventually, the screen will start to glitch again. Also, occasionally when the computer crashes it won't boot back up again, the boot starts but the bar gets stuck at around 25% or sometimes 70%.
This has been a very frustrating issue for me, I actually stopped using this computer in 2020 but after a need arose I plugged it back in with the hopes it would work again and it did! And it worked perfectly, for a couple of weeks. Now the same old problems have reared their heads again.
Any help would be greatly appreciated. I have attached the latest crash report:
iMac 27″, macOS 12.7
