How to change resolution of extended display to 2560 x 1080 on Macbook Air

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How to change resolution of extended display to 2560 x 1080 on Macbook Air

I am trying to change the resolution of my extended display from the 1920 x 1080 default resolution that macOS automatically made it to its recommended resolution of 2560 x 1080. I went into settings under displays, but I couldn't find the 2560 x 1080 I want. I found a few videos that show how to do it with external applications or on older OS versions, not Sonoma, which is what my Mac is on. I would prefer a native solution over using a third-party application. Thanks in advance.

MacBook Air 13″, macOS 14.6

Posted on Jul 29, 2025 5:29 PM

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Answer 1

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Servant of Cats

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Jul 30, 2025 5:52 AM in response to diaphragm

LG – LG 29WN600-W 29 inch 21:9 UltraWide WFHD IPS HDR10 Monitor with FreeSync

LG – Help Library – LG Monitor - Connecting to a Mac (seems to be generic, not specific to your display)

That's a 29" 2560x1080 monitor with a maximum refresh rate of 75 Hz. It has two HDMI inputs and a DisplayPort input. It appears to support HDMI v1.4 and DisplayPort v1.4.

I can't think of anything to try, except

Making sure that your HDMI adapter and cable support 4K, or
Substituting a USB-C to DisplayPort adapter cable (that supports 4K) for the USB-C to HDMI one that you must be using now.

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