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  1. #1


    Member Since
    May 31, 2011
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    5
    Cannot switch between applications, use drop downs etc
    I hope someone can throw some light on this problem before it drives me insane. For some reason, and not after the installation of any new software or updates, I cannot switch applications anymore. When I use CMD Tab it shows my active applications, but where I normally keep pressing cmd tab to cycle through them to select one, it is flashing through them without any input from me as such a speed that you can't choose one. It's like the keys are being pressed repeatedly as fast as the computer can do it. If I use expose (or is it spaces?) to show the windows I have open I cannot click on one to select it using the mouse. I initially thought that I had a problem with the keyboard, but it still failed with mouse only, and normal use of the keys is not affected.

    I restarted the computer and opened text edit to see how it switched between two apps, but this is the same.

    I also have a problem in Firefox, where I cannot choose an item in a drop down select list, and if I add a bookmark it flashes the dialogue box up for a split second and then it disappears, adding the bookmark as if an "ok" button is pressed immediately. It's OK in Safari and Chrome. There are other applications that are a bit glitchy when trying to select text using the mouse.

    It is like there is a constant keystroke happening which interferes with certain functions, but I am lost. Any ideas? Thanks

  2. #2

    mrplow's Avatar
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    Oct 01, 2007
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    27" iMac i7 (2011) 10.11, Mac Mini i5 (2014), iPhone6s, Apple Watch, iPad Air 2, New AppleTV (4?)
    I'd say you've got a stuck key. Any spilliages on the keyboard?

    Give the Tab and CMD keys a few presses. Are they moving freely ?

    You don't say what hardware you're using but is it possible to try a different keyboard?
    Not been around these parts for a while. Trying to change that . .

    Please use the reputation system if you think you've been helped - bottom left of this post

  3. #3


    Member Since
    May 31, 2011
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    Hi mrplow, thanks for responding.

    The first thing I thought about was the keyboard, as many a person I know has been floored by such a simple thing, but the keys are working fine, and I am using a different keyboard now for this reply, just in case, but that also does not stop the rapid "pressing". The other point is that I cannot switch by going to expose and clicking on the window I want to use their either, which is not using the keyboard, and things like auto complete on the firefox address bar flashes up the choices menu then disappears in a split second.

    Sorry, should have said, I am on an iMac, SL 10.6.7, 3.06 GHz Intel Core 2 Duo, 4GB ram.

    I thought it was a Firefox issue, but I have upgraded to v4 and nothing has changed.

  4. #4

    mrplow's Avatar
    Member Since
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    Specs:
    27" iMac i7 (2011) 10.11, Mac Mini i5 (2014), iPhone6s, Apple Watch, iPad Air 2, New AppleTV (4?)
    Are you able to open a text editor, say text edit and type normally into that?
    Not been around these parts for a while. Trying to change that . .

    Please use the reputation system if you think you've been helped - bottom left of this post

  5. #5


    Member Since
    May 31, 2011
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    yes indeed. Most aspects are working normally, and both the command and tab keys are working separately.

  6. #6

    Slydude's Avatar
    Member Since
    Nov 15, 2009
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    Is this problem confined to one account? Try creating a new user account and see If that account is affected as well. If it's not that would suggest there are some corrupt files somewhere in your existing account.
    Sylvester Roque Former Contributing Editor About This Particular Macintosh

    "Got Time to breathe. You got time for music." Denver Pyle as Briscoe Darling

  7. #7


    Member Since
    May 31, 2011
    Posts
    5
    Thank you for helping out on this. I am not normally beaten on things and couldn't figure out why it wasn't a simple key stick. I have now found the culprit - I have a mouse with a scroll wheel that can tilt left and right. This was set to horizontal scroll and had obviously stuck, giving a permanent signal. This doesn't affect many things, but when I was using photoshop and the image scrolled it gave me a clue. Bloody thing - watch out for this. I couldn't understand why it was restricted to just a small number of things.

    Thanks again for the replies.

  8. #8

    Slydude's Avatar
    Member Since
    Nov 15, 2009
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    Specs:
    2.8 GHz MacBook Pro 10.11, 8 GB mem, iPhone 6+
    Wow never would have guessed that. Thanks for posting the fix. What kind of mouse was it?
    Sylvester Roque Former Contributing Editor About This Particular Macintosh

    "Got Time to breathe. You got time for music." Denver Pyle as Briscoe Darling

  9. #9


    Member Since
    May 31, 2011
    Posts
    5
    No problem, I always curse when I find a useful thread that matches my issue and it is either not resolved, or worse, the original poster says "it's OK, I have fixed it" and doesn't leave their solution - that really winds me up!

    It's a logitech MX cordless mouse (I threw my "magic" mouse out of the window and went old school)

  10. #10

    mrplow's Avatar
    Member Since
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    27" iMac i7 (2011) 10.11, Mac Mini i5 (2014), iPhone6s, Apple Watch, iPad Air 2, New AppleTV (4?)
    Thanks for posting back.

    Welcome to the forum BTW
    Not been around these parts for a while. Trying to change that . .

    Please use the reputation system if you think you've been helped - bottom left of this post

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