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.

I have this problem for sometimes. Really annoying, especially when working on photoshop. I have external monitor attached. And using my Macbook Pro 16 in Clamshell mode.

1. Use USB docking (baseus 16 in 1 dock)
2. Using Pen Tablet using USB
3. Logitech Bluetooth Keyboard
4. Logitech Bluetooth MX Anywhere Mouse
5. 2 external hard disk connected
6. Using USB-C to DisplayPort Connector for External Monitor

I tried the mouse using Bluetooth and also the Dongle come with the Logitech mouse. Both of this method show stutter. With the dongle stutter is worse.

This happens for sometimes, change to Wired mouse the problem was gone. But I am still trying to make my Logitech Bluetooth works as I like the mouse a lot.

Did many things in many forum discussing this problem.

Then stumbled in just one discussion forum. And install this software called Smooze (https://smooze.co/). 7 days trial, so might try if this is works or not.

Magically after using this software, all the stutter using Bluetooth Mouse is gone. I didn't know what was going on, but the stutter issue just gone.

So maybe just might give this small program i try. I am not related to Smooze in anyway :)

Thanks

My laggy mouse seemed to be related to my USB3.0 external hard drive. This is explained in this blog post. I ejected the drive and unplugged it, which seemed to make the lagging go away.

I am using:

1. Logitech MX Anywhere Mouse 2S
2. MX Keys Mac
3. MacBookPro Intel Core i9 on OS Big Sur 11.6

I am also using a USB C DisplayPort External Monitor, but the problem seemed to tbe the external hard drive, not the USB C monitor.