2016 Macbook Pro won't recognize Dell 34" monitor

Discussion in 'MacBook Pro' started by sn0warmy, Nov 13, 2016.

  1. sn0warmy, Nov 13, 2016
    Last edited: Nov 14, 2016

    sn0warmy macrumors 6502a

    sn0warmy

    Joined:
    Mar 26, 2009
    Location:
    Denver, CO
    #1
    SOLVED: Apple's AV adapter with an HDMI cable solved the issue and allows me to use my Dell 34" (U3415W) monitor at native resolution (3440x1440) @ 60Hz.


    .......
    I'm running into one big issue since switching from my 15" Macbook Pro (mid-2015) to the 13" Macbook pro (late-2016). The new laptop will not recognize my Dell 34" monitor. I previously had my old Macbook Pro connected to the monitor with a mini displayport cable. I never had any issues with that setup.

    I purchased the Thunderbolt to mini displayport cable from Apple but when I hook that into the computer and the mini-displayport cable, the monitor just hibernates and the computer will not detect it as a display. I've tried rebooting the monitor and computer, switching the thunderbolt ports on the computer, as well as trying to force the laptop to detect the monitor but nothing helps.

    I'm planning on picking up thunderbolt to HDMI and a thunderbolt to DVI adapters to test tomorrow. But I don't see why the mini displayport adapter wouldn't be working since the mini displayport cable was working perfectly fine for my old setup with the same monitor.

    Any ideas?
     
  2. WolfSnap macrumors 6502a

    WolfSnap

    Joined:
    Sep 18, 2012
    Location:
    SoCal
    #2
    The Thunderbolt 3 to Thunderbolt 2 adapter IS NOT a mini DisplayPort adapter..

    Basically, what you're trying to do won't work.

    You need Thunderbolt 3 -> HDMI or USB-C -> HDMI. (Or, DVI.. whatever..)

    But, the TB3/TB2 adapter is just for THUNDERBOLT -- not DisplayPort.
     
  3. lympero macrumors 6502a

    lympero

    Joined:
    Sep 1, 2008
    Location:
    Arta, Greece
    #3
    Welcome to dongle nightmare. Keep in mind that most of the adapters apple is forcing you to buy, don't support 60hz output in high resolutions so in other words you need a new display (you guessed it, apple is selling those new lg displays and tim really wants you to buy a new one and ditch your crappy dell monitor /s)
     
  4. Rian Gray macrumors regular

    Rian Gray

    Joined:
    Jul 13, 2011
    Location:
    NJ, United States
    #4
    I would recommend using one of these. Should be helpful until USB-C settles in.

    At any rate, the explanation I got was that previous gen thunderbolt was simply borrowing mini display port, and thus Thunderbolt 3 to Thunderbolt 2 adaptor will not deliver any video over it, as that was handled via display port, not by Thunderbolt.

    If you are like me, and use external monitor and other devices on workstation alongside a laptop, I'd highly recommend getting a thunderbolt dock as well.
     
  5. Cougarcat macrumors 604

    Joined:
    Sep 19, 2003
    #5
  6. sn0warmy thread starter macrumors 6502a

    sn0warmy

    Joined:
    Mar 26, 2009
    Location:
    Denver, CO
    #6
    Thanks! I kind of figured I was confusing the nomenclature of the Thunderbolt/Mini Displayport cables. I can't believe how confusing Apple has made this.

    I'd return this computer and stick with my mid-2015 15" MBP before I went and bought a new monitor. I only switched to the newer one so I could get a smaller screen for easier use while traveling. So far it's proven to be more of a pain in the a**, instead.

    I'm going to pickup Apple's A/V adapter which has the HDMI, USB-C and standard USB connections all in one. It sounds like this should solve the problem while also expanding my USB ports, which I use often.

    https://www.amazon.com/Apple-USB-C-...6746&sr=1-8&keywords=apple+digital+av+adapter

    Thanks for the help, guys.
     
  7. theitsage macrumors 6502a

    Joined:
    Aug 28, 2005
    #7
    Let us know if that Digital A/V adapter gives you native resolution @ 60Hz through HDMI.
     
  8. sn0warmy thread starter macrumors 6502a

    sn0warmy

    Joined:
    Mar 26, 2009
    Location:
    Denver, CO
    #8
    Sounds good. I'll be buying/testing it out later today. Sorry for my ignorance, but where would I go to check if it's @60Hz?
     
  9. theitsage macrumors 6502a

    Joined:
    Aug 28, 2005
    #9
    Open System Information then look under Graphics/Displays.

    Screen Shot 2016-11-14 at 09.55.29.png
     
  10. sn0warmy thread starter macrumors 6502a

    sn0warmy

    Joined:
    Mar 26, 2009
    Location:
    Denver, CO
    #10
    Excellent. Thank you. As soon as I finish up with my upcoming client call I'll run and pickup the adapter. Should have results around 2PM EST.

    If this doesn't work my plan-b will be to order a true USB-C to Mini Displayport adapter.
     
  11. sn0warmy thread starter macrumors 6502a

    sn0warmy

    Joined:
    Mar 26, 2009
    Location:
    Denver, CO
    #11
    The AV adapter works perfectly! Using the HDMI cable I'm getting full native resolution at 60Hz with my Dell 34" (U3415W) monitor.

    [​IMG]

    [​IMG]

    It also allows me to utilize a standard USB connection and an additional USB-C connection. Now that I've got it sorted I'm pretty happy with this setup.
     
  12. pifpaf macrumors newbie

    pifpaf

    Joined:
    Nov 14, 2016
    #12
    Hi,
    I'm planning to do the same setup in a week and little bit confused.

    Could you tell what's your experience so far?
    Is that non-TB Macbook Pro?

    What are you using it for? (that screen).
    I'm planning to use it for Sketch application and general apps usage.
    Doesn't it lag or something?

    And last, stupid question.
    Is that right setup? » Macbook Pro » A/V adapter » HDMI cable (from Dell monitor) » Dell monitor.

    Thanks a lot in advance. Really worry that it won't work properly :)
     
  13. sn0warmy thread starter macrumors 6502a

    sn0warmy

    Joined:
    Mar 26, 2009
    Location:
    Denver, CO
    #13
    I use my 34" monitor mainly for digital marketing, some web development and data analytics. So for me, it's main use is with web browsers and large spreadsheets in Excel.

    I can tell you that there is absolutely no lag with the large monitor. My previous setup was with a mid-2015 15" Macbook Pro and a Mini Displayport connection hooked up to the same monitor. Switching to the late-2016 13" Macbook pro (non-touch bar) and the HDMI connection has made no difference in overall performance.

    The connection you outlined is correct. [Macbook pro » A/V Adapter » HDMI Cable (which came with the monitor) » Monitor]

    Here is a picture of my setup. The only difference is that the silver 15" MBP has been replaced with a Space Gray 13" MBP.

    [​IMG]
     
  14. pifpaf macrumors newbie

    pifpaf

    Joined:
    Nov 14, 2016
    #14
    Thanks you sooo much for response! Now I'm convinced :)
     

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