High Sierra Beta 6 color problem on iMac 5K

[JPOWA]

Hi,

I just updated my iMac 27" 5K (late 2015) to the last MacOS High Sierra Beta 6 and the colors are all messed up.

Its like inverted colors but when I activate the option the colors don't get back to normal, they are even more strange.

Anyone with the same problem?

 

[subcritical71]

Just installed on my iMac 27" 5K (late 2014) model and have no issues.

 

[JPOWA]

Had to reinstall MacOS from the recovery partition. After that everything become normal again.