Magic Mouse disconnects

I have been having this problem for quite some time. It happened in Mountain Lion and I am now running Mavericks.

Doesn't seem to be a Yosemite issue.

I came across this article: Wi-Fi and Bluetooth: Potential sources of wireless interference - Apple Support

Lo and behold, I looked about a half meter to my right and there was my cordless phone, running at 2.4 GHz.
room

I moved the phone and it's been over a week without a single disconnect.

The solution is:

1.- Go to /Library/Preferences

2.- Move SystemConfiguration (CUT+PASTE) to ~/Desktop

3.- Make sure the folder SystemConfiguration is not under /Library/Preferences anymore

4.- Reboot the computer

5.- Problem solved

Cheers

i follow this and lets see how it goes.

will report back soon

I have had the problem the last period of time. Might be after yosemite, I cant really remember exactly. My mouse moves very slow, and stuttering and disconnects/reconnect etc. The same goes for my BT trackpad. I've had the computer for years and no problems in the past. First, I thought that the bluetooth unit in my MBP was faulty, but it seemed that others had the same issues.

I tried the disable Wifi, and then my BT units works fine again. There must be some kind of issue in Yosemite that causes this error. I really hope that it will be fixed soon.

I also have a wireless phone on my desk but I have had this in several years without any problems.

I'm repeatedly getting the 'Connection Lost' message with my brand new Magic Mouse and 15" MacBook Pro. The issue began immediately after I set them up yesterday.

I've read that it may be the batteries, but I'm using the factory-supplied Energizer batteries so surely they should work. I'm not using any wireless devices nearby other than my iPhone 5, which I imagine should also be fine.

I'm willing to invest in the Apple rechargable batteries, but I'm unsure if this will make any difference given that the problem is there with the Energizers I'm currently using. I could exchange the device for a new one, but I don't want to be without a mouse for a week whilst it's being processed.

Any advice would be appreciated. I'm loathed to stick paper inside the mouse given the cost of the device, so if that's the only solution I'll reluctantly get a refund and buy a mouse from an alternative brand.

o used all correct batteries ect mine is i mac aswell january this year 2015 , in end i had to replace mouse i no this is not much help but your not alone with the problem , it was driving me nuts connected then dis connected up to now new 1 seems ok i have a track pad i ended up using that upon looking very close the back bit that holds battries is was not that tight made of poor metal alsonice mouse but very poor quality made look hard at the back see if its fitting tight im looking at old 1 now it looks sealed but touch it lightly you may find same thing worth a look under sorry not a lot help

Sounds like we're waiting on an OS update for this.

Dear friends..it seems its actually a battery contact problem..

I was having this for last month..i came across a simple solution in some forums in internet..i am just copying those solutions here..the second one is easier and it worked for me. I'm using magic mouse without connection drops for last two months...

1 Remove the batteries from the Magic Mouse.2 Cut a small piece of aluminum foil about ½-inch square in size.3 Wrap the aluminum square around the negative terminal of the battery.4 Re-insert the batteries into the Magic Mouse.
The extra thickness of the aluminum foil produces a bit of additional force wedged between the battery and the spring-loaded contact. This makes the battery less likely to be jarred away from the contact when you move the Magic Mouse around.
This may be enough to fix most Bluetooth disconnect problems, but if your Magic Mouse still experiences an occasional disconnect, there's one more modification you can try.1 Remove the battery cover.2 Cut a piece of paper into a rectangle about 1 inch by 1-½ inches.3 Place the paper on top of the batteries, roughly centered. Tuck any excess paper around the edge of the batteries.4 Re-install the Magic Mouse battery cover.
The extra paper acts as a wedge between the batteries and the battery cover, to help hold the batteries in place.
These tricks worked for me.

Last week the issue returned at random, and resetting the PRAM has again, temporarily solved the issue.

When is this nonsense going to be patched, Apple?

Cordless interference fix lasted just over a week. After that, I tried mactofer's fix and have had over a month of trouble free performance.

Magic Mouse disconnects after switching back to Duracell batteries, I tried mactofer's fix that lasted about 2 days, the mouse is stationary and looses connection other times I move the mouse a hair it looses connection.

any other ideas ...

I've had random disconnections all day long, tried rebooting and resetting the PRAM as suggested above and it worked for me... 2 hrs without a disconnection.

I have the same problem as the people on the forum.

Its a brand new MBP 13" and magic mouse.

Moving the prefs did not help. I am very close to returning the mouse as it simply a joke to have it disconnect 8+ times per day at random times whilst using the mouse.

Get your **** together apple.

I've tired every possible thing there is. Tin foil. Energizer, Duracell, paper in between the batteries.

I want my $60 back to buy a real mouse. But apparently apple doesn't care.