Highly abnormal graphic glitch on yosemite / retina: all white backgrounds appear pink 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
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.