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This is driving me insane... All of a sudden my mouse cursor starts jumping and clicking around by its own. It doesn't look like somebody is remote controlling it. It rather is jumping around randomly, executing clicks or context menu commands just without any obvious aim.

This usually happens while I am working a while with the MacBook sitting on my lap. My feeling is that battery level could play a role here since the problem occurs only when the battery got drained down to below 50%. But it is just an impression. Could also have something to do with temperature, although I do not do CPU heavy stuff (just browsing).

I could do nothing against it. I switched off WLAN and Bluetooth. No fancy touchpad driver is running (though I had one running some time ago, called magicprefs).

There are some similar cases around the web but I did not find any solution yet.

Any help would be WOW, rainer

PS MacOS X, most recent Mountain Lion, MacBook Pro 13"

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Just curious - the computer still is usable, the mouse just will jump and click at random intervals? So it's normal, then jump/click, then normal, then jump/click? –  bassplayer7 Dec 7 '12 at 12:51
    
The computer is fully usable, in theory. It is sometimes impossible to really use the trackpad, because the cursor is moving and clicking around. Then, for some seconds, you can use the thing as normal. But then it starts again... I put the computer yesterday evening to sleep, while connected to the power source and he was making this weird things. Today morning I opened up the lid and the problem was still there. He kept his crazyness while in sleep mode... –  Rainer Dec 7 '12 at 14:01

2 Answers 2

up vote 1 down vote accepted

I went to my local mac dealer and it seems that the trackpad needs to be exchanged.

Update: It was definitely a hardware problem. Since the trackpad got exchanged, everything went back to normal. Most probably liquids found their way into the pad (a drop would be enough to mess everything up).

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unfortunately I´m experiencing the same thing since yesterday. I don´t even touch the mouse but the mouse keeps moving in a 3 to 5 seconds interval.

Did you proceed with this problem?

What I found so far: - It is not the mouse (Magic Mouse) nor Bluetooth. Switching off both doesn´t change anything. - It´s not in my account. Switching to another account is not the cure.

I´m really embarrassed, but I solved the problem here.

Yesterday my mouse battery was empty and I connected an old microsoft mouse with a cord because I ran out of loaded batteries. After reloading batteries I continued using Magic Mouse. But I didn´t disconnect the cord mouse but put it into a box. And since than I had tis problem. Removing the cord mouse solved the problem.

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Hi,as you can read below: I had to exchange the trackpad. This is a common problem when the trackpad gets exposed to liquids like juice, water or whatever. –  Rainer Dec 19 '12 at 8:30

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