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Mouse lag when connected to an external display (with MacBook lid closed)

Device information: MacBook Pro (15-inch, 2017)

Mouse information: Logitech G903

Display information: LG 34-inch ultra-wide

System: macOS Big Sur 11.2.3


Problem:

The cursor has a significant lag when I connect my Mac to the external monitor with the lid closed. But the cursor can move smoothly when I connect to the monitor with the lid open. Mouse is connected to my Mac through a USB-C hub, and the monitor is connected via an HDMI cable. Does anyone have a fix on this? Thank you!


MacBook Pro 15″, macOS 11.2

Posted on Mar 14, 2021 3:02 PM

Reply
Question marked as Top-ranking reply

Posted on Apr 27, 2021 12:32 PM

Hi Ryan, thanks for replying! The problem was that every time I connected my mac to the external monitor, the refresh rate would automatically be set to 30Hz, so I had to manually set it back to 60Hz. Now it all works perfectly.

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Mouse lag when connected to an external display (with MacBook lid closed)

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