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Old 06-19-2019, 05:49 PM   #4
Justin's Avatar
Join Date: Jan 2005
Location: NYC
Posts: 12,902

Contrary to my post in the thread for the previous build though, I am having GUI sluggishness with this build on my iMac Pro.
Have you tried setting the display colorspace to 'Generic RGB'? This is a couple of years old but might still apply:

(Those big retina displays support 10-bit color and the macOS-provided color correction is incredibly slow!)
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