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Especially since the 10.8.3 update, I've been experiencing occasional freezes of my 2012 Macbook Air's trackpad and keyboard. The trackpad will be completely unresponsive, and usually only a few keystrokes will get through. Other people have complained that similar things happen after resuming from sleep, or that it takes a reboot to fix, but this happens randomly (it'll be working perfectly fine and then become unresponsive, then be fine 10 seconds later).

I have no external USB devices connected, and nothing shows up in the system log at the relevant times. In addition, as has been suggested by others online, I've disabled the Android File Transfer helper process which apparently has caused similar issues for others.

It's still under warranty -- should I take this to the Apple Store, or perhaps try reinstalling the OS first? Will that be their first line of attack anyway, or do you think they'll be able to diagnose a hardware problem and fix/replace it?

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Bringing it to Apple for check up before warranty expires is a good idea. If it is sporadic and not related to specific program running (user program) it is probably your system/hardware. If you want to find out more, Enable the CPU monitor in Activity monitor, and see what it does during the times of hiccups. Select the keep CPU monitor on top, so it will be always there. –  Buscar웃 Apr 11 '13 at 10:18

3 Answers 3

I would create a new user and see if the behavior happens under a new account, so you can isolate whether this is System Wide or just related to your own account. Check your Launch Items in system preferences and remove everything just to test.

How much free space do you have? For what is worth, I'm using a MBA 11' mid 2011 and I have the same behavior sometimes when Arq2 starts and I have IntelliJ + Xcode running. Like the CPU is under a lot of "pressure" and I totally experience the same. It lasts a few seconds (10 sometimes!).

So I doubt there's anything to do, unless this happens very often to you, in which case I'd take it to an Apple Store for either reinstall or some hardware check.

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Not sure how this answers the question. Keyboard and trackpad resources are not account specific. –  Buscar웃 Apr 10 '13 at 19:01
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If the item causing a problem is started or launched due to a config in the user preferences, then using a new user would potentially remove that influence. –  Wing Tang Wong Apr 10 '13 at 19:44
    
@Buscar웃 If you can't see how it solves, then you don't understand where the problem may rely. If his problem is software related (probably) he needs to find what piece of software is causing the lag. If it's hardware, then Apple Store will find it. –  Martín Marconcini Apr 10 '13 at 19:54
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Thanks for your answer. When I have the time, I will go through my launch items and perhaps create a new user, to see if something I'm running is causing the problem. I do have plenty of free space on my system, and this doesn't happen at times of load, and didn't happen when I first got the machine. –  cablesm Apr 10 '13 at 23:19
    
Good luck with it. To further investigate this, we'd have to go through your apps and see if we have something in common. :p –  Martín Marconcini Apr 10 '13 at 23:57

Do you have a good deal of status bar icons/services? I found in my case, that one particular service had caused my trackpad/keyboard to be unresponsive(turned out to be the wifi service). Disabling it in the top menubar may help.

In the case of the other answer, about creating another user account, this would have a similar effect, as your various preferences are set to default, so there may not be a conflicting service/interface effect at play.

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have a look this! might lead to smth could be the answer! https://forums.dropbox.com/topic.php?id=49254

besides in my case, the trick with another user didn't work...

i am checking this method to solve the issue

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