Pink and Green full screen

I found one solution. Turn off the automatic graphics switching under the energy savings settings in system preferences. This took care of the bug for me.

Thanks for the tip! Turning off "automatic graphics switching" in energy savings settings. Fixed it on my MacBook Pro 15" (2017 model)

I tried all the things you tried and even called Apple support with no joy. This isn't a fix but a work around of sorts, until a fix comes I found that QuickTime pro 7.6.6 on my Mac Mini still plays the video correctly in fullscreen. I also found that the movies that I bought directly from Apple work but not my movies I have from Amazon, Rifftrax etc..

This bug, affecting specifically (and at least) viewing movies in iTunes full screen mode, has been around for many years and dozens of bug reports have been filed to Apple about it - it seems that it's something they either can't or are not willing to fix at all.

It has only gotten worse, if something, as it previously used to only appear with subtitles but now during times of High Sierra is sure to appear as soon as the cursor disappears on pretty much any movie viewed with iTunes.

I have this issue as well, also on a Mac mini, in both iTunes and QuickTime: as soon as the on-screen controls disappear, the colors blow out. It started happening immediately after the upgrade to High Sierra.

One additional data point: if I use Screen Sharing on another Mac to connect to the Mac mini, the colors return to normal. It's as if Screen Sharing keeps the screen active in the same way that moving the mouse does.

Changing ColorSync profiles does not help. Turning off hardware acceleration or running in safe mode might help, but there is no way to do that in recent versions of QuickTime.

It does not happen in VLC or any web browser.

I've posted a new question with a more descriptive title and links to all of the related questions I found. Hopefully we can consolidate and get more attention on this.

Fullscreen video turns pink and green in QuickTime/iTunes

Silver hammer:

Yes diagnosed as exactly the same. In fact I was on apple care call with panda a great senior advisor. He wanted to witness this problem and I shared my screen with him as they can access your conputer remotely. As soon as he accessed my computer the pink or green screen disappeared. I felt like I was imagining it. Another data point I have 5 Mac atv’s mappped to my iTunes and the sharing is not affected by this phenomena. The people sharing the library do not experience the pink and green screen. Please let me know if you figure out a solution.

Alexis:

I have the same exact problem on my mac mini and it was fine using safari. Did you ever find a solution? Keith

Thanks, screen sharing did the trick.

I don't even have that setting. Mac mini 2014. Integrated Graphics - maybe that's why?

I guess you could have codecs problem in your Mac since VLC working fine but YouTube didn't.

If VLC doesn't work it could be that you have driver or hardware problem.

But since you've already done like reinstall and reset everything my only guess is that you've hardware problem.

Try these:

1. Try to use gfxCardStatus from here: https://github.com/steveschow/gfxCardStatus

2. Test it by switching to Integrated and Dedicated. See which one or both having the problem.

Try clean install and don't install anything except gfxCardStatus.

If one of those having problem than it could be driver or hardware problem.

If you try to watch another movie will it give you the same problem or is it just that one movie?

If you watch any movie using an app like VLC will it give you the same problem too?