Magic mouse 2 mouse lag on macbook pro 16" 2020

Hello everyone, I use a late 2016 touchbar MAcbook Pro with highest specs and I think I solved the issue. At least found out the reason. This Magic Mouse 2 lag thing happens due to interference with USB-C external peripherals somehow.

I am using a Dell U2518D as an external monitor and connected with USBC to DisplayPort Cable. I changed the USB-C port from right to the left side and lag ended. You can try different combinations if you have any external peripherals. It looks like, in my setup, right side of the USB-C ports on my mac does this interference. It hapened with a USB-C multi connection HUB as well.

Please try and share your findings. I really don't want to give up on my Magic Mouse 2 as I am used to it with many gestures.

I believe I have found the root cause of this issue in my environment: Macbook Pro 16" 2019 with Apple Magic mouse 2 with MacOS Big Sur. I use my LG Display with USB C support to power my laptop. Intermittently, I can have a laggy mouse pointer issue when it seems like it is losing connection or just lagging behind (very frustrating). I came a cross an Apple article talking about a "Jumpy" mouse issue and it suggested third party power sources can cause this. The test for me was to unplug and run on batter power. The mouse started to behave as expected. Try to use the original power brick that came with your Mac and it may correct this unwanted mouse behavior as it did mine. Added Note: i did try the other method of removing all bluetooth devices but this did not correct my issue.

I tried many things and non worked. Then I found this article on resetting the bluetooth module. What worked for me is doing the Factory Reset All Apple Connected Devices from this article: https://appleinsider.com/articles/21/01/05/how-to-reset-bluetooth-on-macos-big-sur

The whole thing took 1 minute.

Until discovering this, I had done the following and had no positive results:

• PRAM reset
• Turning off and on
• Removed paired devices and re-pairing them
• Delete plist files in the library
• Killing various processes in Activity Monitor

It had been a bother for months. So far, in the last five days I have not encountered a problem.

As you said you tried with all the USB ports empty on your macbook, it is probably an intereference with another wireless device on your desk or your room. I would try turning off every wireless device around and turn them on one by one and check the mouse everytime I turn on a device. It is a bit weird because maybe a device don't cause interference individually but when two different devices turned on together might cause an interference.

There is clearly an insulation or a resource management issue on Macbooks about the Magic Mouse. Why because it doesn't do this with another bluetooth mouse such as logitech or microsoft.

garthatron wrote:

By conincidence I also searched twitter for issues with the magic mouse yesterday and found a statement similar to @benisevme. I have two Dell U2715H monitors connected to USB-C dongles connected to the right side USB-C ports. So I switched one dongle to the left side port and have been testing so far in a variety of use cases.

So far my experience has been positive.

Stay tuned.

I have no issues since I moved the monitor cable to the left side ports. I have an old Microsoft 5000 Bluetooth mouse and it is not affected in any means. This is something special to Magic Mouse 2 I guess.

So this is is exactly when I have the problem with mine - a 16" 2019 MacBook Pro - and it ONLY HAPPENS when I have USB-C accessories attached to the machine.

Currently, I have (well, a slightly complex setup) the power connected on the RHS of the laptop. On the left, I have a USB-C to display port cable connecting me to a Dell P2014H monitor. I then have a USB-C > 4-port USB-A hub connected which then connects to the USB Hub in the back of my monitor.

My mouse lags like CRAZY to the point of being downright frustrating. I tried it with my Logitech MX Master (which I use with my work laptop) via bluetooth and it performs the exact same way, so it's not specific to the Magic Mouse 2...

This has to be some kind of interference caused by the USB-C controller because when I yanked the hub out of my machine, the problem went away but without that, my setup is all but useless; I use it for WFH and also streaming/content creation (which is what my Mac is for).

Nice going Apple, remove all the ports and render your machines frustratingly unusable...

Resetting Bluetooth module is a solution that is not going to last. I tried that as well. The only solution is trying different USB C connection schemes.

As mentioned above, I moved my Dell 25U18 USB C to the left side ports and problem solved. I use an expansion hub on the right side with 2 x USB C connectors which has sd card reader on it. Power in and printer connected through this hub. So far so good. So What I learned, certain connections will make the mouse lag.

It’s definitely worse when I run things like Adobe software, but there was still a slight lag even when the only process running actively was Chrome with a few basic tabs open.

I installed the supplemental update that was released yesterday and that seems to have corrected the problem (for now).

This issue popped up on my MacMini (2018) with Big Sur 11.1 immediately after a security update today.

Factory reset of all apple devices cleared up the problem. You'll need a non-apple mouse to get the apple bluetooth devices to reconnect.

By conincidence I also searched twitter for issues with the magic mouse yesterday and found a statement similar to @benisevme. I have two Dell U2715H monitors connected to USB-C dongles connected to the right side USB-C ports. So I switched one dongle to the left side port and have been testing so far in a variety of use cases.

So far my experience has been positive.

Stay tuned.

WOW, also moved my USB-C Adapter to the right and the problem of lagging mouse is gone!? Who would have thought.

Did you try with empty USB-C ports?

I have fixed it by cleaning the mouse's lens.

I've tried everything, it is driving me insane. I've used a logitech wireless keyboard and mouse...keyboard doesn't lag, mouse does like every 2-3 seconds. I've tried a bluetooth mouse...same problem.

I am using a Pluggable thunderbolt dock with a single cable driving all devices through a single port on the Mac for cleanliness. Do the same thing with a work setup, no issues with that one, identical hardware except my monitors.

I tried scaling, not scaling, different mice...clean install from scratch after full wipe of hard drive in disk utility, fresh Catalaina latest update install. Same issues no matter what.

I really don't know what else to try at this point.

Then I would take to an Apple store, can you please post back the result here? Thanks