Suddenly, all white and transparent image backgrounds appear pink for me (but only on images, not on anything else that's renderered).

For example, the SE searchbar looks like this:


Or the latest email from amazon:


Or the tag:


The problem does only occur on HiDPI resolutions. If i launch Display Menu and switch to a normal resolution, the problem disappears.

This started after i had the decency to run Quartz Debug Tool to read the FPS of the OS X GUI. I clicked "Disable 2D Acceleration", but it froze my system and forced me to reboot.

Something must have gotten messed up. Anyone know how i can remedy this?

I tried a PRAM reset and deleting windowserver plist files. To no avail.

MBP Mid 2014 | 1TB | 2.8 GHz | 16 GB | Intel Iris Pro / NVidia GeForce GT 750M

1 Answer 1


After a night's sleep and some clear-headed research, i found the solution by running:

defaults delete -g CGContextHighlight2xScaledImages

... which is a debugging feature that comes with Quartz Debug and which i had set there (and forgotten) by checking the "Color 1x artwork" option.

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