Magic Mouse lag on MacBook Pro Mid 2012

[mghostsoft]

Hello,

I received my MBP 15" (Mid 2012) several days ago. But my Magic Mouse doesn't work very well with it. The cursor lags every several minutes to one hour or two, and lasts for several seconds to several minutes every time. I don't mean that the movement is slow - when it happens, the cursor doesn't follow the movement of the mouse timely, or it doesn't response to the mouse at all. The cursor may "jump" to the destination 0.3~1 second after I moving the mouse. I tried everything I can do but the problem is still not solved. Here are what I've tried:

* Turn the mouse off and on.
* Turn the mouse off, replace the batteries to new ones, and turn on.
* Restart the computer.
* Remove the mouse from the list of Bluetooth devices, and pair again.
* Reset PRAM and SMC.
* Disable WIFI.
* Unplug everything in my room that has a wireless receiver, including Xbox, Apple TV, etc, and remove the batteries of their controllers.

None of the above works! However, I also have a Magic Trackpad which also uses Bluetooth but it works fine. I tested the Magic Mouse on my old MacBook Pro and it works without any problem. The distance between the mouse and the laptop is less than 2ft.

I've been struggling with this problem for several days. I am about to get a Logitech mouse. Does anyone has any ideas? Thanks a million!!

 

[andymac2210]

I'm having the EXACT same issue with the exact same new MBP, noticed it within a few hours and it still persists.

I've tried everything you've tried and not found a solution so far.

 

[gibs2b]

same problem here

I have the Magic Mouse since the release, and I was using it with a MacBook Pro 15" Unibody Core 2 Duo (mid 2009). It was working perfectly.

I just have purchased the MacBook Pro 15" mid 2012, and the Magic Mouse lag.
Batteries are new. The MacBook Pro is at 2 meters from the Magic Mouse.
If I put the Magic Mouse closer (about 1 meter) there is no more lag.

This is not the way I want to use it.

I have opened the MacBook Pro to check if the antenna's connector are well fitted and they are.

So I can't use the Magic Mouse anymore.

 

[andymac2210]

It seems the newer MBP's have terrible bluetooth for some reason, even the retina's and airs.

 

[thomashs]

Magic Mouse Lagging

I have an late 2010 MBP 13", core 2 duo and upgraded to 8Gb ram, 256Gb SSD. I've noticed the same behavior since I upgraded to Moutain Lion 10.8.2. The cursor seems to Lag sometimes (sometimes it looks like it's freezed - just like when the batteries are dying), and sometimes it went back fast. I talked to Apple Support here in Brazil and they are suggesting to downgrade the OS to a lower version than 10.8.2 and wait for a fix to upgrade. I've read in other forums that sometimes it's related to a older version of Dropbox installed (upgrading might get fixed - didn't worked for me though). Hope to get a fix soon!!

 

[xmlking]

Same problem with Magic Mouse and MacBook Pro with retina display 2012

I have Same problem with Magic Mouse and MacBook Pro with retina display 2012. It stops responding. I have close the back cover and reopen to force it work

 

[milouchien]

It was Bluetooth on mine...

Not sure if you have the same cause, but try checking the bluetooth signal strength. Go to the bluetooth System Prefs pane and click on the mouse item in the list while holding down the ALT key. Each time you click on the list item, it will tell you the signal strength. This will change depending on where the mouse is in relation to the MacBook etc... Excellent signal = -20. Useless signal = -90...

Heres a how to:
http://osxdaily.com/2012/07/13/bluetooth-signal-strength-mac-os-x/

I found that my mouse became very unresponsive where I usually use it at around -78 to -85 (around 1m away from the MBP with a cinema display and a focusrite audio box between). As soon as I put it near to the MacBook Pro it went up into the -50's and was rock solid.

So I had a bit of a brain wave and thought I'd apply a bit of pressure to the top edge of the MBP screen where the bluetooth board is situated. This is just to the left of the iSight camera lens. I thought the connection (which practically touches the back of the screen) might be a bit flaky. If I squeeze it across the general area, the connection might improve...

Well - it worked!

Signal in my normal mouse working area ranges from -65 to -78 now. This is still low, but it works.

Hope it might be helpful to someone...

 

[Satyr118]

I have the same infuriating problem after recently purchasing a mid 2012 MacBook Pro, and have tried all of this plus to no avail. In comparison, my 2013 and 2015 MacBook Air did just fine with my Magic Mouse 2, but this one not only seems to make the mouse slow when the computer is loading something, but it will also disconnect both my Magic Keyboard and Mouse at random, and I then have to remove them from the Bluetooth list and re-connect them. I'm starting to wonder if getting a replacement Bluetooth card would even be worth it, or do these models simply prioritize CPU loading over Bluetooth connection? According to the computer, the Bluetooth card works fine. No amount of charging the Bluetooth devices or getting them closer or further away from the Bluetooth antenna or using a different WIFI band solves this problem.