I have a 27" 5k iMac (Late 2015) and recently upgraded to Catalina. I'm running into a problem where videos will have a green screen intermittently. Specifically, I will be playing some of my videos on the iMac and they will play fine, but then after a while, the sound will play but the video will be solid green. It doesn't matter if I play the videos from the Finder, Photos, Quicktime, or any other application - they are all green after the problem starts. I can reboot my iMac to fix the problem, but it is getting very frustrating because it happens pretty regularly. I remember having this issue a few years ago in a different version of OSX and there was a fix inside of the Quicktime preferences (something to do with video hardware acceleration)... but things have changed and I can't even seem to find the Quicktime preferences anymore. I suspect this is some kind of video driver issue, but I have very limited knowledge on Mac about how to troubleshoot these issues.
Any fixes or suggestions of what to try (other than reboot my iMac every time it happens)? I was thinking that restarting the Quicktime engine or something like that might help, but can't figure out how to do it.
Any fixes or suggestions of what to try (other than reboot my iMac every time it happens)? I was thinking that restarting the Quicktime engine or something like that might help, but can't figure out how to do it.
