After installing MacOS X El Capitan I'm unable to use my computer with three external monitors, after I plug third one independent of port ordering computer freezes, everything was working for quite a long time on Yosemite, how can I fix this problem?

1 Answer 1


I have the same problem when I connect only one external display, but perhaps that's because it is a 4K display. So far, the only thing I've found to work is to restart the computer with the display already connected. This allows me to use the display, but if I disconnect and try to reconnect the display, it will freeze up again.

  • It wouldn't launch in my case at all... I will try to reinstall os..
    – Lu4
    Oct 8, 2015 at 13:42

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