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A MacBook Air 2014 outfitted with Big Sur and a single 2560X1440 (2K) monitor via HDMI. Apple indicates:

Intel HD Graphics 5000 Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors Thunderbolt digital video output

Resolution is output at 1080. How does one command the machine to provide a 2560X1440 resolution option?

Is there a test that can be performed to eliminate the cable as the bottleneck?

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  • According to Apple's specs that Mac supports "...up to 2560 by 1600" (EG not 1440) Sometimes getting different resolutions requires the use of a 3rd party utility like SwitchResX or the like Commented Mar 4, 2022 at 20:26
  • @SteveChambers Thanks for the reply. I am using a pair of said monitors on Catalina Desktop
    – gatorback
    Commented Mar 4, 2022 at 21:09
  • The way I am reading this support.apple.com/kb/SP700?locale=en_US is that it will support up to that resolution on a (single) external monitor. It may support two monitors but the combined resolution of both need to be less than or equal to that resolution. Commented Mar 4, 2022 at 23:28
  • @SteveChambers Clarification: I am successfully running a pair of said monitors on Catalina. The MacBook is connected to only one monitor.
    – gatorback
    Commented Mar 5, 2022 at 13:18

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