New MacBook Pro with Touchbar - Displayport / External Monitors Issue

Discussion in 'MacBook Pro' started by skel_73, Nov 20, 2016.

  1. skel_73 macrumors member

    skel_73

    Joined:
    Feb 12, 2002
    Location:
    Toronto
    #1
    I just got my new MacBook Pro with Touchbar. Maxed out, souped-up. It is replacing my 2012 Retina MacBook Pro.

    My old set up was to connect 2 Dell monitors (a Dell U2715H and a slightly older one) to the MacBook using 1 connection through an OWC Thunderbolt hub (display port connection) and the other straight into the MacBook Thunderbolt port with a Displayport cable. No issues, worked flawlessly.

    With this new machine, I bought 2 Thunderbolt 3 (USB-C) to Thunderbolt 2 adapters, so that I could connect the monitors.

    Nothing is working well.

    With the Dell U2715H, the computer will expand the desktop as if the monitor is there, but the monitor will not sense a signal and will remain black. If I turn everything on and off 5 or 6 times, eventually it will show the image.

    With the other monitor, it will work only if I connect it through the OWC hub. So the adapters were expensive and were bough solely to support my ability to use the 2 monitors, and they are not working.

    Apple's Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter will NOT support a Displayport connection to a monitor, unless (weirdly) it is run through a hub like the OWN Thunderbolt 2 hub. And even then, you may have to turn everything on and off multiple time to get the screen to show.

    This laptop cost a lot of money and I need it for productivity. External monitor support via Displayport should be something that works rock solid out of the box.

    Anyone else out there figured out a fix for this?
     
  2. xraydoc macrumors 604

    xraydoc

    Joined:
    Oct 9, 2005
    Location:
    192.168.1.1
    #2
    You made the mistake of trying to use Apple's TB3 to TB2 adapter for monitors. It specifies it doesn't support DisplayPort video. There are USB-C to DisplayPort video cables, however.
     
  3. pshifrin macrumors 6502

    pshifrin

    Joined:
    Mar 14, 2010
    #3
  4. Pencilnink macrumors member

    Pencilnink

    Joined:
    Oct 5, 2016
    #4
    I made the same mistake and bought the Thunderbolt 3 to Thunderbolt 2 adapter assuming it would work with DisplayPort.

    Unfortunately that doesn't work so I bought a USB-c to display port adapter on Amazon from Cable Matters and it works perfect.

    Your DELL U2715H has DisplayPort Out, why not daisy chain both externals and save your thunderbolt 3 ports for other accessories?
     

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  5. sinoka56 macrumors regular

    Joined:
    Jun 13, 2013
  6. skel_73 thread starter macrumors member

    skel_73

    Joined:
    Feb 12, 2002
    Location:
    Toronto
    #6

    I tried daisy-chaining and for some reason could not get it to work. That would have been the perfect solution. The other monitor is the Dell U2711.
    --- Post Merged, Nov 21, 2016 ---
    Thanks for all the replies, much appreciated.
     
  7. Pencilnink macrumors member

    Pencilnink

    Joined:
    Oct 5, 2016
    #7
    Ah i think it didn't work because the Dell U2711 doesn't support DisplayPort 1.2.
     

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