I have a MacBook Pro (Retina, 13"-inch, Early 2013) with 8Gb RAM and Intel HD Graphics 4000

I also have a 19" Polyview 16:9 monitor connected via Thunderbolt to VGA adaptor, which displays its native resolution of 1440x900.

I recently purchased an LG 29UM58-P ultra wide monitor, which has a native selection of 2560x1080 at 21:9 aspect ratio, connected via my HDMI port. Unfortunately, all windows and text is stretched to fill the screen.

In System Preference --> Display --> Resolution --> I can choose from 1600x900, 1080p, 108i and 720p. I have selected 1080p at 60 Hertz.

I've also downloaded the Onscreen Control app from LG's, but can't seem to access it in System Preferences even after selecting it in Security & Privacy --> the Accessibility panel ??

How can I get my monitor to display its native resolution at the correct aspect ratio without stretching all the windows etc?

Many thanks in advance for your help! :)

  • Have you tried temporarily detaching the 19" Polyview monitor, and if so, did that make any difference in what the LG monitor could display?
    – Nic
    Commented Apr 5, 2020 at 4:40
  • Yes, I did and no difference unfortunately. Thanks! Commented Apr 6, 2020 at 1:08

1 Answer 1


According to MacTracker, your 13" 2013 MacBook Pro can support:

  • up to 1920 by 1080 pixels on HDMI;
  • up to 2560 by 1600 pixels on Thunderbolt.

So you need to swap the connectors used by each display.

  • Thanks for the swift reply. So, you're saying I'll need a thunderbolt to HDMI converter for my ultra wide monitor to display in its native resolution? Commented Apr 6, 2020 at 1:06
  • @DanŠkaler Assuming that's the input on your display, yes.
    – benwiggy
    Commented Apr 6, 2020 at 8:11
  • thanks, I'll give that a try and see how I go! Just got to find one while in lockdown. Stay safe! Commented Apr 7, 2020 at 6:42

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