MacPro 2013 Multiple Monitors

Discussion in 'Mac Pro' started by jimwww, Dec 24, 2014.

  1. jimwww macrumors newbie

    Oct 5, 2010
    Vancouver BC
    Just wondering if you can help..

    I have 2- 24 inch monitors connected to my MacPro 2013 through two mini display ports (dvi)

    I just bought a 24 inch Monitor that connects through HDMI. I connected it to my MacPro and it now only sees one dvi display.

    I unplug the HDMI and then it sees 2 DVI monitors again... What's happening & how do I get it to see:

    2 DVI displays and One HDMI display.

    I did search.. but not much came up with this config

    Mac Pro (Late 2013), OS X Yosemite (10.10.1)
  2. brand macrumors 601


    Oct 3, 2006
    On the 6,1 the HDMI shares the same bus as the two bottom Thunderbolt ports.

    Do you have both current monitors plugged into both of the bottom Thunderbolt ports?
  3. Cheule macrumors member

    Mar 28, 2009
    On this page:

    It shows this image, which describes which ports are part of which bus.


    Note that for optimal performance, Apple suggests you put each display on a different bus, i.e. 0, 1 or 2.

    If you still have problems after shuffling your displays around on the ports, I do recall a friend of mine with a nMP that said he had problems with setup similar to yours. I can ask him what he did to resolve it. Let us know.
  4. jimwww thread starter macrumors newbie

    Oct 5, 2010
    Vancouver BC
    Both mini display ports..

    Both of them are plugged in up top, either side.
    Hdmi was on lower bus.
  5. itcrashed macrumors regular


    May 4, 2010
    Bay Area, CA
    If using the HDMI port, you can only use one more monitor with a converter. The rest must all be DP. It's not documented, but I've seen a few Youtubes with others stating this.

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