How to get a 3rd external monitor to work

Discussion in 'iMac' started by F3rk3S, Nov 12, 2014.

  1. F3rk3S macrumors newbie

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    Nov 12, 2014
    #1
    Hey Guys, i am new in this forum and hope that some one of you have a idea to help me.

    First of all, my englisch is not the best. I´m from germany but i will try my best to write as good as possible.

    Now lets get to my problem. I have a 27" iMac (late 2013) and i use 2 external Monitors. One is a 27" Cinema Display and the other one is a 27" Thunderbolt Display. The hole setup works perfectly. But now i have added a Wacom Cintiq 13" HD to system.

    If i connect this one via HDMI to Thunderbolt adapter to the Thunderbolt display i get the info that it won´t work. So i called Apple and the support says that the iMac only allows 2 external Monitors.

    So i bought a HDMI to USB3.0 Adapter from CableMatters and it works. But i have some issues like a black document screen in photoshop if the image is a lot bigger.

    Thats why i thought to ask you. Does anyone knows a tool, plugin, script or what ever to get the 4th monitor to work if it is connected normally through hdmi to thunderbolt? I would say that it is only a setting in the system that tells the imac "don´t let this work".

    What are your thoughts about this, any ideas???

    Thanks for reading my post.
     
  2. kendrickhphoto macrumors member

    Joined:
    Jan 20, 2011
    #2
    You can connect the HDMI to an Apple TV and use it with AirPlay Display and either extend your monitor or mirror it to another one. I have a 27" Cinema Display and a Thunderbolt Display connected to my Retina iMac and then I have an old 1080P monitor connected just to an Apple TV and then I can wirelessly have that monitor serve as a 4th display.

    Here are instructions how to setup the AirPlay Display (it's very easy to do) -

    http://www.maclife.com/article/howtos/mavericks_howto_using_apple_tv_second_display
     
  3. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #3
    Nice idea. But do you know if it will work with a wacom cintiq? The cintiq gets the infos from the usb Port but if the device is not connected to the Same Computer it maybe does not find it correctly.

    Or can i connect the cintiq complete to the appletv?
     
  4. kendrickhphoto macrumors member

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    Jan 20, 2011
    #4
    Sorry, I thought you just wanted to get it working as another display. I don't think it'll work the way you are wanting it to with the Apple TV.
     
  5. nrubenstein macrumors 6502

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    Aug 5, 2008
    Location:
    Washington, DC
    #5
    Honestly, it seems like you should have a Mac Pro.
     
  6. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #6
    It looks so right but the machine is to expensive :(

    So maybe there is another workaround. Is there a "machine" or tool so switch between the monitors? Maybe i just stay with the maximum amount of 3 screens (what is totally enough) and have a device so that i can switch between the normal cinema display and my cintiq. Like the KVM switches but for monitors and not computers. Then i could switch without the problem of changing the cables on the back of the imac every time. Any idea???
     
  7. Nosferax macrumors regular

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    Nov 11, 2014
    #7
  8. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #8
    I allready use one and that works. But if i use photoshop the document stays black and does not show any content. Maybe that is a problem of the beta version of the driver but for the moment it does not run perfect. But Videos in 1080p are running smooth and also lightroom has no problem.
     
  9. Nosferax macrumors regular

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    Nov 11, 2014
    #9
    Is your Cintiq hooked to the USB adapter or your Cinema display?
     
  10. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #10
    HDMI through the USB 3.0 SuperSpeed HDMI Adapter from Cable Matters and the USB from the Cintiq is Connected to the USB Port on my iMac.
     
  11. Nosferax macrumors regular

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    Nov 11, 2014
    #11
    I personaly, would connect the cintiq directly to the mac and connect the cinema display to the usb adapter.
     
  12. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #12
    The problem is the resolution of the cinema Display. If i remember right then can the adapter only get up to 1920x1200 and not 2560x1440.
     
  13. Nosferax macrumors regular

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    Nov 11, 2014
    #13
  14. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #14
    Hey Guys, thank you all for your answers. I had a busy time in the last weeks so i could not check for your answers.

    I Think it is a good idea to connect the 2nd Cinema Display with a USB3.0 Connector. The only Problem is that i only find a DisplayPort to USB3.0 Cable but the Cinema Display has a Mini DisplayPort. I haven´t found a Mini DisplayPort to DisplayPort Adapter.

    So does anyone of you have a idea where i can find a adapter?
     
  15. Nosferax macrumors regular

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    Nov 11, 2014
    #15
    http://www.monoprice.com/Product?c_id=104&cp_id=10428&cs_id=1042803&p_id=5714&seq=1&format=2
     
  16. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #16
    Thanks for your Reply but i need it just the other way.

    Female: Mini Display Port
    Male: Display Port

    Only then i can connect the 27" Cinema Display to a USB3.0 Display Port Graphic Card.
     
  17. Nosferax macrumors regular

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    Nov 11, 2014
    #17
    the adapter connect to the minidp on your 27" ACD and you use a regular dp cable from the usb adapter to the female minidp to dp adapter... I don't see why you would need a reversed version.
     
  18. F3rk3S thread starter macrumors newbie

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    Nov 12, 2014
    #18
    Because the ACD has a Mini Display Port Cable Male. So how should i connect it to the Adapter. I Can´t disconnect the regular cable from the ACD.
     
  19. Nosferax macrumors regular

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    #19

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