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MacBook Air Keyboard Input Lag

3848 Views 25 Replies Latest reply: Jun 11, 2013 9:46 AM by dirkoneill RSS
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MittoSFX Calculating status...
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Jul 13, 2012 5:09 PM

From time to time, quite very often when I'm typing, the input is paused for about half a second then appears on the screen as I continue to type. I'm using the default MacBook Air keyboard with no external keyboards attached. I don't know if this is just the keyboard lagging or the whole screen is lagging. This is very annoying, is there a way to fix this? Could this be a hardware problem?

iPhone 4S, iOS 5.1
  • sberman Level 7 Level 7 (23,700 points)
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    Jul 13, 2012 10:01 PM (in response to MittoSFX)

    I've got the same machine (MacBook Air, mid 2012, 8GB) with no problem.  Sounds like you should visit an Apple Store and have them check out your machine.

  • t7000 Calculating status...
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    Jul 17, 2012 2:30 PM (in response to MittoSFX)

    Hi MittoSFX,


    I'm using the same MacBook Air model and having the same issue.

    I've tried a clean install of Lion and the problem seems to remain, but I can't reproduce the problem at will, in which case that makes it difficult to show this issue to an Apple mechanic.

    Have you fixed the issue? if so, how?

  • NigelChan93 Calculating status...
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    Sep 29, 2012 9:18 AM (in response to MittoSFX)

    I also have the same problem.  But I use the 4GB version (mid 2012).  I took my machine to an Apple Store and the woman told me that there is nothing wrong with my machine.  She added that my machine is normal when compared with other machines of the same model.

  • huseinf Calculating status...
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    Dec 17, 2012 1:02 AM (in response to MittoSFX)

    I got the same issue with my MacBook Air 11" (mid 2012) and it keeps happening while the computer runs with a lot of tasks. I still wondering whether the problem comes from OS X Mountain Lion or the hardware.

  • xenod Calculating status...
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    Jan 5, 2013 4:31 PM (in response to MittoSFX)

    Has anyone figured out what's causing to problem or found a solution yet? I have the same problem.


    This is my computer:

    Mountain Lion

    Macbook Air 2011

    4GB RAM, 128 GB SSD

  • clearish Calculating status...
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    Feb 10, 2013 7:19 PM (in response to MittoSFX)

    I have exactly the same problem.  It's only happened a few times, but is really annoying when it happens.  2013 MacBook Air with 8GB upgrade.

  • Agus R. Level 1 Level 1 (0 points)
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    Mar 10, 2013 9:14 AM (in response to MittoSFX)

    Does apple has acknowledged this issue? I have the same problem here with 2012 Macbook Air. I have the model with 256GB SSD and 4GB drive.

  • rtsclement Calculating status...
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    Mar 24, 2013 8:13 PM (in response to MittoSFX)

    Do you all have Google Chrome installed?


    I had the same issue and when I looked at Activity Monitor I was shocked at how many processes Chrome had running.  None of them seemed to be using much in the way of resources - but I thought I would have a crack at removing Chrome and seeing if that made a difference.


    I used AppCleaner to take Chrome out and hopefully most of its dependencies and so far - touchwood - the lag seems to have gone.

  • dchang0 Calculating status...
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    Apr 9, 2013 1:38 PM (in response to MittoSFX)

    Same problem here. It's maddening. It happens once in a long while, maybe once per three weeks.


    The keyboard and trackpad basically lock up and respond very slow. I can type a five letter word and get maybe one or two of the characters.


    The ONLY way to keep typing the word is to slow down my typing and press one key at a time, very deliberately and slowly until that key shows up on the screen, then move to the next key.


    After a few seconds, it goes back to normal. By the time I've got Activity Monitor up and running, it has gone back to normal. (Plus, if I had Activity Monitor open at the time, switching over would be difficult due to the input lag.) Checking right afterwards shows that CPU, Disk Activity, and System Memory were all within normal usage ranges--nothing was pegged at 100%.


    I am running:


    Mac OS X 10.8.3 (but problem happened with earlier versions of 10.8).

    Macbook Air 2012

    i7 2GHz

    8GB RAM

    (all stock, straight from the factory)


    I do not run Chrome--it is not even installed.


    I've brought it in to Apple and they replaced the keyboard and trackpad and reformatted my system drive, but that didn't fix it. In fact, the problem happened not too long afterward, even before I had installed most of my software back on the system.


    It seems to happen the most in Apple Mail, although that may be because that's really the only software I do the most typing in.


    I suspected that it might be the aggressive spell correction features in Lion and Apple Mail fighting each other, but I've turned off the auto correct as much as possible and the problem still occurs.



    Anybody got any news on this issue? I can't bring the Macbook Air back in for service without being able to reproduce the problem consistently.

  • dchang0 Level 1 Level 1 (0 points)
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    Apr 9, 2013 11:55 PM (in response to dchang0)

    I did a little more digging and noticed that I had a lot of errors in my console log like this:


    sandboxd[5958]: ([5926]) mdworker(5926) deny mach-lookup


    They seemed to happen at roughly the same time I was getting the keyboard/trackpad lag.


    Googling it turned up this article which mentions freezes of about four seconds plus a solution that worked for me to remove the errors:



    Note though that even though the errors are no longer showing up in my console log, I don't really know if the keyboard/trackpad lag has been fixed, since it happens so rarely. It might take a month or so before I'll really be sure this was the fix.


    But I'm sharing it here in case it helps somebody else. It is too much of a coincidence that they were also experiencing short freezes of a few seconds.

  • dirkoneill Calculating status...
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    May 13, 2013 8:38 AM (in response to MittoSFX)

    I too have this problem with my 2011 Air and over the last two days it's been much much worse. My original thought was that it was a problem with the SSD drive. I'll keep the console open so that try to find any errors next time it occurs.

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