How do I output 1440P to an external monitor on my MacBook Air (2012)?

Discussion in 'MacBook Air' started by AaronMT, Feb 7, 2017.

  1. AaronMT macrumors regular


    Jun 23, 2009
    I have a 27" 1440P 144Hz monitor (Dell S2716DG) and an old MacBook Air (2012). With a mini-displayport to HDMI input into the monitor, only 1080P is offered in the Display settings.

    What cable and or accessory do I need to purchase to allow for 1440P output from this laptop?

    Do I just need a Mini DisplayPort to DisplayPort cable?

    Why can't Mini DisplayPort to HDMI output anything past 1080P?
  2. Eddie95Z28 macrumors newbie

    Feb 22, 2011
    --- Post Merged, Feb 7, 2017 ---
    I can't speak to the "Why" part, but I do know that I had a similar issue that was resolved by eliminating the DP to HDMI "conversion". Once I connected the mDP directly to DP everything worked as it should.
  3. dogslobber macrumors 68040


    Oct 19, 2014
    Apple Campus, Cupertino CA
    Because MBA HDMI spec is for a max of 1080P?
  4. mellofello macrumors 65816

    Feb 1, 2011
    Yeah I have a similar setup (2012 Mac mini). Over HDMI it maxed out at 1080p.

    Ordered a thunderbolt to display port cable, and voila 1440p immediately.

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3 February 7, 2017