I have a Samsung U28D590 plugged into a Late 2014 Mac mini (with Iris video graphics) via Thunderbolt 2 to DisplayPort.

In the display options it does not give the option for 3840x2160, even after holding the option key while clicking on "Scaled"

Both the monitor and Mac mini support this resolution according to their documentation, so I wonder if I need to install some extra drivers or something like that.

  • Apple does not show it as supported? where did you read that?
    – Ruskes
    Dec 27, 2014 at 19:34
  • @Buscar apple.com/mac-mini/specs
    – Mike
    Dec 27, 2014 at 19:45
  • 1
    video output is what supports 4k. If your mirroring displays it only supports up to two displays at 2560 by 1600 pixels.
    – soulshined
    Dec 27, 2014 at 19:46
  • How would I know if I'm mirroring displays? I certainly didn't configure it that way.
    – Mike
    Dec 27, 2014 at 19:47
  • 1
    That's news to me. I thought 4k video was 4k video, I didn't know the monitor needed to be supported separately.
    – Mike
    Dec 27, 2014 at 19:50

1 Answer 1


Just out of interest what is your screen refresh rate? needs to be low 30hz

Your problem could be related to the Iris graphics chip, just read a few posts mentioning it could be the Iris causing the problems.

What version of Yosemite are you running?

  • version 10.10.1
    – Mike
    Dec 27, 2014 at 19:46
  • Hmm have you tried, using just a hdmi cable instead of the thunderbolt 2/display port cable. Dec 28, 2014 at 21:06

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