Mouse lag Big Sur

This worked great, Yvesclv! Big difference for me in terms of lag. Checking Activity Monitor, WindowServer also went significantly down after making the changes. It went from 85% to about 18-30% CPU usage.

For others with the same issue:

If you are like me and having a hard time finding the Hz settings on the G502 or any other that uses the G HUB, here's a screenshot of where that is set.

I have the same issue with my 13" MacBook Pro. After upgrading to Big Sur, everything works fine except mouse lag. It only occurs with wired mice as the trackpad, Magic Touchpad, and my wireless Logitech Trackball mouse work perfectly fine. Will make due until it's fixed, but still concerning to not be able to easily use a wired mouse for docked work.

Please apple fix this it lags out my games and doc its really annoying. My trackpad moves on my doc fine, my bluetooth mouse works fine, but this razer mamba elite with a dongle makes my doc scrubbing and minecraft gameplay very laggy even if trackpad is fine. Please please please fix this. This is so annoying and I hate big sur until this is fixed. Reply to this when it is fixed.

Yup! Exactly like that. Made a quick video to demonstrate (with commentary - and your video in the background) on the differences between a laggy wired mouse and non-laggy touchpad/bluetooth: https://www.youtube.com/watch?v=MGyOT3VVTJ8 Glad to see we're not the only ones with this issue too, so Apple can put a fix out ASAP!

After getting my reply video up, I read the comments on yvesclv's video and one of the commenters mentioned that the reason wired mice are causing issues with Big Sur is because their Polling Rate (or how many times the mouse reports its position back to the Mac/PC) is too high. Higher polling rates are great for PC gaming, but Big Sur seems to be liking the "classic" value of 125Hz.

I'm using a Logitech G502 wired mouse and using the G HUB application, I was able to see my mouse's polling rate was at 1000 (!!!) and was able to drop it down to 125. The lag went away! Depending on your make and model of mouse, check to see if there's MacOS software you can download to change the polling rate (and if there's only Windows software, download the software to a Windows machine temporarily and save the settings to the mouse directly, so it's remembered when reconnected to your Mac).

Hopefully, this temporary workaround helps you out until Apple pushes out a true fix!

I dont have any windows stuff and razor mamba elite only has synapse 3 support, which isnt in mac. Theres legit nothing I can do until apple fixes this issue. Is there a way that we can get the software team too look at this issue.

Big Sur Bluetooth Probs.

i got a brandnew M1 Apple mini and it can’t connect to my 3rd party Bluetooth keyboard anymore...

Audiacity is not working with ROSETTA, which is slowing anyway and will not support all your software!

Have to upgrade licenses for little snitch 5, so I can’t use Ver.4 for old my probook anymore....

what’s the big from Sur?

I have a Logitech 810-004457 MX Master mouse hooked up to a 16" Macbook Pro with Big Sur. I'm also running 2x LG Superfine 4k monitors. I see some people in other messages reporting it could be related to the video card in this laptop.

Anyway, in the LogiOptions app, I don't see anywhere to adjust the polling rate. Can somebody point me in the right direction? Ever since updating to Big Sur, the mouse lag went from a couple times a week to multiple times an hour. I'd love to find a solution.

I'm also experiencing this issue with my Logitech G203 wired USB mouse, running through my monitor's USB hub on a 13" MacBook Pro 2015 model. Changing the polling (report) rate using Logitech G Hub helps a lot but doesn't totally eliminate the problem.

For what it's worth, when I plug the same setup into a 2020 MacBook Pro running Catalina, I do not experience this issue.

Very annoying!

I tried doing this since Razer Synapse 2.0 does not recognise my mouse anymore on Big Sur. Anyway I hopped across to my windows install with synapse 3.0 and saved the 125Hz setting to the mouse but it doesn't seem to have worked for me. Still get mass lag when I move the mouse while playing games. WoW went from running great on my 16" to completely unplayable:(

Thought this was a great idea and tried it out but it doesn't work for me. The mouse keybinds I set in Synapse 3.0 on PC are remembered in FCP X but it seems the polling rate is still 1000Hz as it lags like **** and WindowServer goes to 130% CPU usage:(

I had this issue also, magic mouse lag but track pad worked fine

I seen a post that that appears to help or may have solved my issue

press and hold ( Option and Shift keys ) select Bluetooth symbol on top of mac

then select ( reset Bluetooth module ) and reset

Definitely better hope it keeps working