Become a MacRumors Supporter for $25/year with no ads, private forums, and more!

4k iMac Screen/Video issue. Brand new.


macrumors member
Original poster
Jan 23, 2016
Ancient Egypt
Just got a brand new 4k iMac.
I noticed almost immediately when watching YouTube videos that when I scroll down and then scoll back up to the video, there are moments when the picture suddenly becomes saturated/red and then quickly goes back to normal. It's fairly reproducible and I tried on many different YT videos, with the same momentary saturation. I recorded as best I can and caught two instance of this happening. It starts to happen at 0:05 and at 0:12. If you pause it at 0:06 and 0:14 you will see the color shift. Anyone know what this could be? I have other PC's and Macs and when comparing the same videos none of the others seem to exhibit this behaviour.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.