New LG UltraFine 4K with MacBook Pro (2015) and 60 Hz?

Discussion in 'MacBook Pro' started by johnscully, Jun 10, 2019.

  1. johnscully macrumors member

    Joined:
    Sep 11, 2010
    #1
    Hi,

    Apple mentions in the Compatibility-List for the new LG UltraFine 4K (23.7 inch) Macs with USB-C/Thunderbolt 3, but says that a MacBook Pro from 2015 (Thunderbolt 2) can rund the display with 30 Hz (instead of 60 Hz like the newer Macs). I've read from a user who was able to run his new LG UltraFine 4K in combination with a MacBook Pro from 2015 with 60 Hz. It is said that you need a Apple-Thunderbolt-2-cable and a "Thunderbolt 3 (USB‑C) to Thunderbolt 2 Adapter" (+ of course the Thunderbolt-3-cable which comes with the display) to achieve the 60 Hz when connected to a MacBook Pro (2015). Can anybody verify that?

    Based on my experience Apples proclaimed restriction to 30 Hz on MacBook Pro (2015) is strange, because I can use any 4K/UHD-Display with a resolution of 3840 x 2160 pixel with 60 Hz connected to my MacBook Pro from 2015. Since the LG UltraFine 4K has the exact same resolution, why shouldn't it be possible to use it with 60 Hz? I'm very interested in the display – but not with 30 Hz.
     
  2. troop231 macrumors 603

    Joined:
    Jan 20, 2010
    #2
    Hello, I'm actually running Dual 4K displays at 60Hz each on my 15" late 2013 rMBP without problems, so I would assume you would be more than ok!

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  3. johnscully thread starter macrumors member

    Joined:
    Sep 11, 2010
    #3
    Yes, I also tested my 2015 MacBook Pro with a couple of UHD-Displays (3840 x 2160 pixel) and 60 Hz worked in all cases just fine. But the thing is: Apple says in a Support-Document (in german language) explicit, that Thunderbolt-2-Macs can run the new LG UltraFine 4K with just 30 Hz. In the same Support-Document in english language Apple says 60 Hz work not just with Thunderbolt-3-Macs, but also Thunderbolt-2-Macs. So Apple contradicts itself. Because of that I'm interested whether someone has already tested the combination of the new LG UltraFine 4K and a Mac with Thunderbolt-2-Ports.
     

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  4. troop231 macrumors 603

    Joined:
    Jan 20, 2010
    #4
    Apple says things like that to make people think that they have to buy the newer machines. My 2013 rMBP technically isn't capable of doing dual 4K @ 60Hz according to Apple as an example..
     

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3 June 10, 2019