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Possibly fix an intermittent left mouse button problem Other Hardware
Periodically, and for no apparent reason, the left mouse button would quit working on my USB Mighty Mouse. Unplug and plug, still inoperative. So I tried another non-Apple mouse, still inoperative. When this happens, the right mouse button works and could activate menus, but I couldn't click on things (I used a right-click and the arrow keys as a workaround to activate menu items). If I restarted the machine, the left mouse button would work for a while. Eventually, though, the problem began to occur immediately on boot. AppleCare suggested things like resetting the PMU, PRAM, etc., but to no avail. Their next solution, on this relatively new and unadulterated Mac, was to reinstall the system software -- not something I was anxious to do, nor did it make sense on this new Mac!

After some digging, I found the solution. It turns out that the Bluetooth mouse and keyboard were enabled, and a nearby Bluetooth mouse had a near-dead battery - I didn't even know there was a Bluetooth mouse nearby. So I disabled Bluetooth while the problem was happening (i.e. not after a restart), and the problem disappeared -- my left mouse button works again. I've had this same problem when I bring my computer to work -- perhaps someone else's Bluetooth device (maybe even a phone?) has been interfering.

In short ... check if Bluetooth is active and look for any nearby devices if you're having odd troubles with a wired mouse.
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Possibly fix an intermittent left mouse button problem
Authored by: rmanke on May 13, '08 10:01:58AM

Would this also fix a problem with an intermittent built-in keyboard on a MacBook?

I have been having a similar problem.



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Possibly fix an intermittent left mouse button problem other idea
Authored by: RSt on Jun 02, '09 12:34:49PM

I thought it was the other Bluetooth mouse in the room that was low in battery. But it wasn't.

The solution was the speed of the double click that was too high for the user...

Hope it can help someone here in a near future ;-)



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Possibly fix an intermittent left mouse button problem
Authored by: smsm1986 on May 13, '08 10:09:33AM

That probably explains why the left button fails to work on my bluetooth mouse when the batteries are nearly dead.



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Possibly fix an intermittent left mouse button problem
Authored by: u2mr2os2 on May 14, '08 06:03:17AM

I have seemingly the opposite problem: I have a Bluetooth Mighty Mouse and keyboard, and occasionally, the mouse forgets it is set up to be two buttons and a scrollwheel and reverts to one button with no scrolling. I can sometimes turn the mouse off and on, but I found that going into the System Preferences and toggling the right button state (which shows the right setting of "secondary") causes it to come back.



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Possibly fix an intermittent left mouse button problem
Authored by: davidcrickett on May 16, '08 01:12:42AM

When playing WoW, you are using the right mouse button all the time, and little by little the wireless Mighty Mouse lose the connection. Not the left button, as in the above post, but the right button. Weird behavior, and the only solution I have come up with is to turn off the mouse on the bottom switch and turn it on again, a rather daft thing to do every twenty minutes. I got a new Mighty Mouse from Apple, very nice, but it had the same problem.
And I don't have any other wireless devices around.


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davidcrickett



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Possibly fix an intermittent left mouse button problem
Authored by: davidcrickett on May 16, '08 01:29:41AM
Hm, I should have searched MacOSXHints first, sorry:
http://www.macosxhints.com/article.php?story=20070103082828118&query=Mighty%2Bmouse

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davidcrickett

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Possibly fix an intermittent left mouse button problem
Authored by: dumdum on May 31, '08 06:35:49PM

i run a cheap iogear keyboard and optical wireless set-up and am experiencing the same behavior. Your own pc and accessories can cause the same effect. try moving the transceiver (the reciever) to a different location. It seems to 'fix' the issue for me.



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Possibly fix an intermittent left mouse button problem
Authored by: grubsam on Aug 31, '11 10:16:17AM

*** SOLUTION *** On my MacPro I had the same problem. My Mac didn't recognize the mouse when using Expose and left-click was not working. After reading numerous posts I checked the Bluetooth Preferences. I found that my one wi-fi mouse was active as two different mouses. I deleted one profile and "poof" all fixed. Good luck all.



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Possibly fix an intermittent left mouse button problem
Authored by: Basementjack on Oct 13, '11 04:51:19AM

Grubsam,

Thanks so much for your post. I was going crazy trying to figure out why my left mouse button wasn't working - after reading your post it dawned on me that I had a second mouse in my bag (Its almost always left at work, but I had brought it with for a presentation)- something must have shifted overnight and the mouse in the bag must have shifted in a way pushed the button on it. Very nice to know this one was 'human error'



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Possibly fix an intermittent left mouse button problem
Authored by: vdeodave on Mar 28, '12 05:42:20AM

THANK YOU!! This has been driving me CRAZY! Sure enough- there was a mouse in a desk drawer with a low batter that was causing this. This is why posting these things is so helpful. I really appreciate this. You just saved me potentially hours of apple care. Thank you Thank you Thank you!



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Possibly fix an intermittent left mouse button problem
Authored by: chaoticneuron on Apr 24, '12 11:12:30PM

For me, it turned out that Spotify was eating the mouse clicks !
So just closing it, solved the problem.



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Possibly fix an intermittent left mouse button problem
Authored by: wizbang_fl on Nov 17, '12 06:36:29PM

I had the same problem, with mine it was a bluetooth headset (not a better brand) that was causing the issue. Stopped using the headset and the problem left. Gave the headset to my roommate and he complained about the same problem. Headset is now in file 13.



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