Magic Mouse tracking poorly and losing Bluetooth connectivity since Mountain Lion upgrade

Apple solved this issue for me. Shut down computer, disconnect everything from screen (imac) including all usb plugs and power. Change batteries in Magic Mouse. Wait one minute then power on again. Problem has gone! Hope this helps others.

I found this fix.

http://macs.about.com/od/tipstricks/qt/Fix-Magic-Mouse-Disconnects.htm

I put the foil in the little holes in the + end of the compartment thinking maybe industrial tolerances for AA battery production might be the culprit. so far so good

As with many other people, the only lasting fix was to disconnect the bluetooth module on my mac pro and use a usb dongle. The wiring on the module appears to have been suspect. Google for details.

I was losing tracking with a Magic Mouse and connection. Very disturbing. Bluetooth showed 46% battery life. Changed batteries, everything back to normal. Why Apple would show 46% battery life when an appliance is failing is a failing of Apple. What's up Apple? Are you guys overwhelmed or just negligent? Better than what? Who?

Tried every suggestion on my MacPro 2012 to no avail.

Happy with my wired MICROSOFT mouse for more than a year now.

Andy

Hi I have read through most of this having had the problems repeat themselves in various of your reported forms. Then I got total failure.

In exasperation I changed my batteries (rechargeable) and the mouse works. Change them back again (fully charged) and it doesn't. Surface and contacts appear perfect. No apparent reason. I scratched the battery connecting surfaces - got brief operation then failure. Examining the failing batteries and comparing them with others I found that the positive terminal are minutely shorter. I will try standard long life batteries until my patience returns!

Acknowledging that there may be several causes to the symptoms described in this thread, one solution that worked for me was simply to insert a tiny bit of aluminum foil in the + pole depression inside the battary container of the mouse. As AA batteries may have slightly different designs, the battery may not make sufficient contact in some cases.

Just one more with the same problem. Yesterday cleaned my mousepad fearing a greasy reflective surface. Not it. Tried another pad too.. Not the problem. Very erratic...does the jitters when it feels like it.

BTW, I have a Snow Leopard Mac. Avoided "upgrading", and from what you guys have said I never will upgrade the OS.

Getting ready to try a few of the easier solutions written up here. At lease saved me the cost of replacing the mouse.

I had the same prblem for a while with a MacBookPro 2011.... I even but a new Magic Mouse... which solved the problem for a while but it restarted again.... I think that Apple is selling a really crappy mouse.... It is counting on us to pay $70 every year to replace it.... Surprisingly, in order to solve the problem, i change surfaces... The mouse would not work on any kind paper or cloth but IT WORKS on glossy papers or surfaces.... So there is something going on with the optical sensor... I cleanned it with alcohol but it did not make a difference nor changing the batteries on reisntalling it as a Bluetooth dvice... Any thoughts?

DLondynski, after following much the same path, I found the same solution worked for me. Everything was fine, all systems running well, suddenly the magic mouse stopped tracking. Clicks work fine, scrolling works fine, but the cursor simply won't track - it freezes and jerks and takes me five minutes to coax it across the screen. I cleaned the work surface (same work surface for 4 years with no problems), I cleaned the mouse, I blew out the optical sensor, cleaned the battery terminals, changed the batteries - nothing helped. Grabbed a piece of plastic I had nearby and placed the mouse on that surface - perfect tracking. So something's up with the optical tracker - it's not reading off the same surface I've been using it on for four years. I will continue to search for a solution, but in the meantime, I'll use what does work. (Note to Mountain Lion users - I'm still running Snow Leopard; your mileage may differ.)

i have/had that same issue and i just did a hdd ssd upgrade and found that my bluetooth wire was the issue being a loose connection it was not a software issue