Lauda89 - Unfortunately, no. I had the Mac Pro fixed on Mojave 10.14.6, and was making sure not to install any macOS Security Updates, and one day it just suddenly went bad, causing the eye strain.
Since then I've spent months trying a variety of approaches, either:
- Reverting the Mac Pro to a variety of Time Machine backups; going back as far as a 3-year old backup
- Erasing the internal drive, and installing fresh copies of Mavericks 10.9.0 through 10.9.5, Sierra 10.12.0 through 10.12.6, High Sierra 10.13.6, and Mojave 10.14.0 through 10.14.6
- Using macOS app BackupLoupe, comparing my Time Machine backups of the last good backup (when it caused me no issues) to a backup shortly after it went bad, in trying to discern which specific config files could have changed
- Disabling/swapping various kext's; some of which would disable hardware acceleration
- Examining/testing with a combination of EFI Firmware updates - where booting from an external drive with a different macOS version installed than the internal drive, to see how the older or newer firmware (installed as part of the macOS install) behaves in comparison to the other macOS version on the other drive
- All the other standard macOS-specific tricks; PRAM/SMC resets, disabling font smoothing, etc
And unfortunately, no matter what I've tried, I cannot get this desktop back to its original state…. where it caused me absolutely no strain for 8+ years, connected to my trusty old (DVI-based) 23" Apple Cinema display, from 2006.