Connecting 4K Display to iMac late 2013

Discussion in 'iMac' started by baselalsaadi, Jul 12, 2015.

  1. baselalsaadi macrumors newbie

    Joined:
    Dec 7, 2013
    #1
    Hello everyone,

    I need your help with connecting my new 4K Samsung TV (UN55HU7000FXZC) to my Late 2013 iMac

    I got this TV for quite cheap and used - so don't have the box and manual, etc... it's got a few HDMI ports in the back, a few USB ports (one USB3.0), One Connect, etc.. etc... but i don't see a display port..
    Specifications for the TV are 60Hz, 3840x2860...

    For my Macs, I have an iMac (late 2013) connected to another Dell (2560x1440 resolution) monitor via thunderbolt to display port, and the working perfectly. The other thunderbolt of this iMac is connected to an external hard drive which hosts my files and operating system.

    I hope to find a way to add to my thunderbolt ports on my iMac, but can't seem to find a splitter of any kind. Nonetheless, at this moment, I have hooked up this new TV, but via Airport through my apple TV however the resolution is maxed at 1080.

    I also have an early 2015 Macbook pro with no shortage of thunderbolt 2.0 ports, and the capability of displaying onto a 4k TV; however, when I plug it in via thunderbolt to HDMI converter, I am not able to get the 4K resolution (only 1920x1080)

    Now, specifically, the advice I'm seeking is as follows:

    1) Connection with iMac, is there a way to hook up this TV and have it display at 4K while simultaneously keeping my Dell screen? (ie. three screens). Is it possible to split the thunderbolt? connect the dell display via USB to free up a thunderbolt?

    2) Connection with Macbook Pro.. Am I using the proper cable? Why is it that I can't achieve 4K resolution?


    Thank you everyone in advance,

    Cheers
     
  2. yjchua95 macrumors 604

    Joined:
    Apr 23, 2011
    Location:
    GVA, KUL, MEL (current), ZQN
    #2
    First, it won't work.

    The iMac cannot output to 4K. Unless, you do a lot of troublesome tweaking, and even so, it'll be an unusable 30 Hz.

    On your rMBP, you cannot use HDMI. You have to use mDP.
     
  3. wmy5 macrumors regular

    Joined:
    Oct 27, 2012
    Location:
    upstate NY
    #3
    No it's not that troublesome. Just use SwitchResX, even my MBP early 2011 15" with low-end 6490M graphics can output 4K via mini DP. The refresh rate is indeed capped to 30 though. Unless you play games, I don;t think 30Hz is unusable for web, word processing, photo editing, etc.
     
  4. baselalsaadi thread starter macrumors newbie

    Joined:
    Dec 7, 2013
    #4
    Thank you for the responses. I will look into SwitchResX; however, I was under the impression that a late 2013 iMac would be able to output 4K (see link)

    https://support.apple.com/en-ca/HT202856

    Also what about a thunderbolt splitter? Because I am running out of thunderbolt ports on my iMac..


    Thanks!
     
  5. wmy5 macrumors regular

    Joined:
    Oct 27, 2012
    Location:
    upstate NY
    #5
    According to Apple, 4K displays should work perfectly at 60Hz without any tweak. You don't need SwithResX, it should just work. Thunderbolt ports are daisy-chainable so you could put your display at the end of a chain.
     

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