Magic Mouse lag issue.. new insight

have the same issue with 2011 Macbook Pro and mm, using my mbp closed with external monitor, will try shift-cmd-option later and will report if that fixes my problem.

Same issue on my iMac with Time Capsule. This might be a fluke, but I was messing around with some settings, turned off the translucent menu bar and the problem suddenly went away. Might be worth a shot as this worked for me for whatever reason.

I've also experienced this problem with my MacBook Pro (2011), and I could fix it by turning off AirPort. The MacBook Pro was connected to the same network at the same time with an ethernet cable. Being connected twice to the same network with and without a wire maybe somehow affected the bluetooth controller.

Exactly the same problem, you described exactly what I have been experiencing since I got may MacBook Pro in 09. I don't how I withstood it so long. Hopefully Apple will get a fix, it has been way too ling.

Haha removing my battery cover from my magic mouse solved the problem.. makes no sense at all but i will have to continue working without the battery cover..

Any one else tried this?

EDIT: I am even more confused when saying this but it has also solved the entire system to quit jerking.. zooming, dragging windows and even my stuttering connection with the keyboard disappeared..

Same here.. Works like a charm until I start downloading at like 2mbps with a WiFi connection...

i had the same problem. i ruturned the mouse, got a new one, and now it works as expected

I also had this problem (lag, lagging, slow, jittery, erratic, disconnects) with my new Apple Magic Mouse and a Mac G5 Quad-core Intel Xeon (from October 2009) and it turns out after MUCH INVESTIGATION that the aluminum case is definitely interfereing with the bluetooth antenae that is inside the G5 Tower Case. I bought a Bluetooth Adapter and plugged it to my Mac or the Wired keyboard (even the back of the monitor) and it works like a charm. ABSOLUTELY no problems now!! It can not wake the computer from sleep with the mouse, but i do that with my keyboard anyway...

It is super tiny and works on Laptops and Towers. iOgear USB Micro Bluetooth Adapter. It plugs into any USB port and replaces your existing Bluetooth antenae service from the computer. Plug and play, no software needed for Mac:

http://www.amazon.com/IOGEAR-Bluetooth-Micro-Adapter-GBU421/dp/B0018O9JIG

or

http://www.iogear.com/product/GBU421/

Yes same here. Works perfect for me aswell.. logic solution seems to be that the magic mouse is running on a newer version on bluetooth and it was not communicating properly with the built-in bluetooth chip on my mac mini..

Confirming this solution worked for me as well.

I am running a Macbook Pro with a trackpad, MAGIC mouse, and keyboard as well as an Airport Extreme. Uploading large files and doing Time Machine backups to my network drive rendered my bluetooth devices useless.

I added the second seperate 5 GHz only network in the Airport Extreme settings through the utility, changed my network settings to prefer the 5 GHz connection, and poof all problems solved as well as having faster upload speeds!

I've got this issue with my 2011 MBP.

Whenever a TM backup is running (Ethernet cable to my Time Capsule, NO WIFI ON AT ALL), my magic mouse lags.

It's just whenever it's backing up to the TC and has nothing to do with WIFI for me.

Any ideas?

MacBook Pro 15 inch Mid 2010 2,66 GHz Intel Core i7

connected by LAN

bluetooth: broadcom

Apple Cinema Dispaly 30 inch (connected by minidisplayport to dual-DVI adapter)

Mighty Mouse

Mighty Mose stutters only during (but nearly always) Time Machine backups (with or without WiFi activated on MBP)

5 GHz not really an option because I want WiFi for iPhone

If I disconnect the cinema display everything's smooth!

I've come across slow laggy mouse issue recently, I found in the end it was my routers wireless channel , i set it to another channel and now mouse is fine.😕

Thanks for the tip DanS2! Initially, I tried changing to another channel but it didn't help resolve the issue. After changing to yet another channel and switching from "mixed g+n" to "n only" mode on my DIR-655 router it seems that there is no more lag, however I haven't had a chance to test this extensively.

I can definetely confirm that the issue is with the Bluetooth/Wireless because I currently am having this problem using the mouse in Linux. My computer uses a wireless adapter which is very near my Bluetooth adapter and I think they are both on the same channel. When I load webpages or update the system the mouse becomes unusable.