It seems like a reset and is happening a dozen times per hour. It happen via HDMI on my Dell U3415W and on a low resolution projector (1024x768px), i used the original Apple adapter but also the Minix.

Sometimes when it returns i have heavy artifacts on the display and have to unplug/plug the hdmi again for normal operation.

  • This shouldn't be happening. Did you contact Apple about this? This might be a defect with the onboard or external graphic card.
    – rwzdoorn
    Aug 23, 2016 at 12:50
  • 1
    not yet, will try that and update this post
    – kritop
    Aug 23, 2016 at 17:43
  • I have had this problem with 2 different MacBook 2016's and numerous Dell monitors, all connected by HDMI via Apple's Digital Multiport Adapter.
    – jaydisc
    Nov 29, 2016 at 8:08
  • I've updated to Sierra 10.12.3 and the problem remains. It goes black even more often
    – vladimir
    Feb 22, 2017 at 5:55

1 Answer 1


This issue was fixed with macOS Sierra 10.12.2 (16C679)

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