Can someone confirm - No MST on 2016 MBP?

Discussion in 'MacBook Pro' started by nick0, Mar 29, 2017.

  1. nick0 macrumors newbie

    Oct 27, 2011
    I have a 2012 rMBP that had issues with daisy chaining my 3xU2414H with DisplayPort. Are Apple seriously not offering MST capability in the new MBP's and will I have to go and buy 3 new USB-C to DP/HDMI cables or adaptors and fill up all the ports?
  2. killawat macrumors 65816

    Sep 11, 2014
    Mac OS does support MST but only for hires, not for Daisy Chaining. Windows will support MST including Daisy Chaining on the same hardware, not sure why Mac OS hasn't implemented this yet.

    Your best option would be to use a TB3 dock that will give you 2x Displays output.
  3. nick0 thread starter macrumors newbie

    Oct 27, 2011
    I don't think this will work either. I have a TB2 dock with my current mac that won't support a MiniDP and HDMI monitor unless they are mirrored.
  4. killawat macrumors 65816

    Sep 11, 2014
    A TB3 dock will work for this scenario. TB2 docks (as you mentioned) does not support this for various reasons. TB3 has sufficient bandwidth for dual displays from the dock and it is a noted feature of most TB3 docks that have multiple ports:

  5. joevt macrumors 6502

    Jun 21, 2012
    I think the problem is not the bandwidth, but the TB2 dock. You can use a TB3 dock on a TB2 Mac and make two displays work with that. Or you can connect a TB3 to Dual DisplayPort adapter to a TB3 device connected to a TB2 Mac. Remember that a TB2 Mac can daisy chain two Thunderbolt 2 displays from a single Thunderbolt 2 port.

    OWC makes a TB2 dock and a TB3 dock. They have one of these notes:
    1) For the TB2 dock: Dual monitor support requires the use of at least one Thunderbolt display.
    2) For the TB3 dock: Dual displays require a native Thunderbolt 3 display or the appropriate Thunderbolt 3 adapter.

    The Thunderbolt 2 ports of a Thunderbolt 2 dock only support Thunderbolt. Conversion to DisplayPort must be done in some other device (such as a Thunderbolt display or Thunderbolt display adapter) connected further down the chain. I'm not sure why this is the case, since the Thunderbolt 2 ports of a 2015 iMac or MacBook Pro also support DisplayPort.

    The Thunderbolt 3 ports of a Thunderbolt 3 dock support Thunderbolt 3, DisplayPort 1.2, HDMI 1.4, and USB 3.1 gen 2 using the appropriate cable or adapter.
  6. joevt macrumors 6502

    Jun 21, 2012
    Correction: A Thunderbolt 2 dock's Thunderbolt 2 port can be used for a DisplayPort display. This worked with an OWC Thunderbolt 2 dock. I could not get both a DisplayPort display (Thunderbolt port) and a HDMI display (HDMI port) to work at the same time though from the same dock.

    I ran into an issue trying to connect two displays to a single Thunderbolt 2 port of a Thunderbolt 2 MacBook Pro using various docks and adapters (including the Thunderbolt 3 to Dual DisplayPort adapter). macOS is kind of not smart in this regard. If both displays are 4K, only one will work even if you set the working display to a lower resolution. The trick is to connect a low-res display first (2560x1600 60Hz) such as an Apple 30" Cinema display or smaller, then a 4K display, then replace the low-res display with the other 4K display.

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5 March 29, 2017