Some one have an idea what my problem is here?
https://www.youtube.com/watch?v=YE18Tuuwzwo&feature=youtu.be
Modelnavn: MacBook Pro
Model-id: MacBookPro10,1
Processornavn: Intel Core i7
Processorhastighed: 2,3 GHz
Antal processorer: 1
Antal kerner i alt: 4
L2-buffer (pr. Core): 256 KB
L3-buffer: 6 MB
Hukommelse: 8 GB
Boot ROM-version: MBP101.00EE.B05
SMC-version (system): 2.3f36
Yes, it's a video driver bug in MacOS 10.10.
Disable GPU drawing in Photoshop's preferences for now, or go back to a stable version of MacOS.
And please let Apple know about this so they can get the information they need to fix the bugs introduced in MacOS 10.10.