Mac OS Big Sur - mouse stutter (not a Bluetooth problem) I'm experiencing really annoying mouse stutter on my MacBook Pro 16 inch. When I move the cursor it's smooth for a few seconds and then it suddenly stops for a split-second before moving again. This stutter/lag is there all the time.
It started about a week ago and it doesn't stop. I restarted the computer, reset everything that is to reset on a Mac (except reinstalling the os) and it still persists.
I googled that problem and almost all posts I found relate this to the Bluetooth connection. That's not the case for me because the stutter is also there when I use the built-in trackpad.
Any ideas?
I was having the same issue. Problem was being caused by using a secondary monitor that was connected to the USB3.1 slot of my iMac. (Display-to-USB3.1) For me the problem was solved after reconnecting/changing it to a different USB slot. I also can confirm it has nothing to do with the mouse since i was experiencing the same issue with a WacomPenTablet.
So it definitely has something to do with USB ports and Displays.
I Hope this helps.