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Contribution d'origine par : Heriberto Pérez ,


My display started doing the same,  but when i connect and external monitor via HDMI or Thunderbolt both screens work perfectly , the other fun thing is that if i run the machine on windows or linux it works perfectly , so i think  is not the screen nor the cable, one technician told me it was something with the hertz , the frequency the screen is working with macOS , change the refresh ratio but,  change it to the same that wndows or linux uses with this screen , the thing is that i have tried many ways to do it with not success and im stock with the problem still.  [br]

I hope someone knows how to fix it ,  thank you