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High input lag and poor performance using lg 4k display

I've used my 2020 (base model) 13 inch MacBook pro with this monitor and everything works great.


When I switched to my 2019 16inch MacBook pro with 8gb graphics the monitor looks significantly worse and the input lag between mouse movement and cursor movement is awful.


I've tried using mouse/trackpad, displayport/hdmi, different Thunderbolt ports, restarted my computer, checked for updates. No luck.

MacBook Pro 16″, macOS 11.1

Posted on Jan 21, 2021 2:50 PM

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Jan 24, 2021 12:34 PM in response to Sp00m

Hi there Sp00m!


It sounds like you are having trouble getting your 16 inch MacBook Pro to work seamlessly with your external display. We'll be glad to give you some tips that could help.


Are both of your Mac computers running the latest macOS? Is there any software for your external display? If so, is it up to date on both Mac computers?


Take a look here to make sure that the display is connected correctly: Use external monitors with your Mac


We hope this helps.


Take care!


High input lag and poor performance using lg 4k display

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