Make display in yosemite / el capitan look like Mavericks Ever since Yosemite came out, I have not been able to look at my screen for more than 10 minutes without it causing me a headache. I was hoping that this would be resolved with El Capitan, but that wasn't the case either.

Is there a user guide or software patch out there to make the system brightness / contrast / white point settings look like they did in Mavericks? The reason I have to be using El Capitan, is that the latest Xcode doesn't work with Mavericks.

Thanks much.
I though initially you meant you wanted the old skeuomorphic UI back… but you just mean that the display has changed or lost its colour profile. There should be no automatic change in your colour settings between Mavericks &amp; Yosemite or El Capitan, so the first thing I'd check is whether your correct profile is still present &amp; active.

Check the profile exists &amp; is active in System Prefs > Displays > Color

If not, or if you can't quickly find one that suits you, then hit the Calibrate… button &amp; attempt to recalibrate manually. It will talk you through the process quite comprehensively, but it isn't a hugely accurate process - sometimes going through it a couple of times you get a better result.

More accurate calibration, of course, would require a hardware colorimeter, which would probably be a different question. I put a couple of budget recommendations at the end of this answer - https://apple.stackexchange.com/a/185936/85275