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Questions that relate specifically to Macs and peripherals with DisplayPort hardware (not Thunderbolt).

15 votes
Accepted

RMBP outputs 4k@60Hz ONLY when lid open

Solved! The solution is about as weird as the problem. To enable 60Hz in clamshell mode, I had to Option-click the "Scaled" radio button on System preferences' Display resolution screen, then the Ref …
Filip Růžička's user avatar
9 votes
2 answers
4k views

RMBP outputs 4k@60Hz ONLY when lid open

I recently got a new Philips BDM4065UC UHD monitor for my Late 2013 15" retina MBP (it's amazing), connected it using DisplayPort 1.2 (also set on the display) and when using both the built-in display …
Filip Růžička's user avatar