This is a bit of a long one but here goes. I've upgraded to mac high sierra 10.13.2
I first started to notice oddly that pictures on my website when viewed from preview or safari were extremely overly saturated and extremely dark. When i tried firefox or chrome images were perfect. Mac preview has same results as safari. So I then decided to calibrate my monitor again with palette master element and when verified results they failed in the results. So first question is why am i getting this new very odd color malfunctioning in safari/preview? This only happen son the monitor by the way. The macbook pro and my macbook as well as ipad and iphone all show what they should be seeing but the monitor drastically changes it. So it has to do something that is conflicting with these programs. Is it maybe that the calibration software is not up to date with the latest osx high sierra? I tried making a version 2 and version 4 profile. Version 2 made the entire monitor colors off and everything looked monochromatic.
Could you tell us what kinda of cable you are using? Is there any adapters in place? We recommend using a Display Port cable.