rMBP driving 4K iMac

Discussion in 'iMac' started by trms23, Oct 21, 2015.

  1. trms23 macrumors newbie

    Oct 19, 2015
    Hey forum!
    I wanted to ask you, why a Macbook with Thunderbolt 2 equipped can't drive the new iMac 21" Retina in Target Display Mode Theoretically Thunderbolt is capable of driving 4 Monitors. Why's that impossible here?

  2. cariacou macrumors 6502a


    Jul 21, 2010
    cause Apple blocks it. I'm guessing they're working on a thunderbolt 4k/5k monitor and don't want the iMacs to mess up the release?
  3. theosg macrumors newbie


    Oct 20, 2015
    Bay Area
    Um, Apple didn't include Target Display Mode on 4k 21" iMac or on 5k 27" iMac.
    So there's your problem...

    Or, if you knew that already, one common observation is that Apple loves to gradually solve issues and dole out those solutions. They seemingly haven't solved some issue with Target Display to their satisfaction. What else can be said?
  4. trms23 thread starter macrumors newbie

    Oct 19, 2015
    It's just weird. Either they're working on a new Thunderbolt Display (hopefully) or Thunderbolt 2 is to weak to drive the iMac 4K
  5. mtneer macrumors 68030


    Sep 15, 2012
    I vaguely remember reading something about Apple using a custom timing controller for their retina iMac screens that precludes them from being used in target mode.

Share This Page