How to enable Command-Tab to switch applications
I just upgraded to Lion from Snow Leopard in my iMac, but for some reason Command-Tab is not working.
I already restarted the computer and checked the option (it was already checked) System Preferences / Mission Control and tick "When switching to an application ...", but still not working.
What can I do ?
There is nothing to enable. The option you checked has nothing to do with the application switcher.
You could look through the keyboard shortcuts and see if anything has hijacked that shortcut.
Try starting up holding down the shift key. That will start up in safe mode and disable any third-party programs that might be affecting it. It also does a disk check, so it takes some time. See if it works in safe mode. If so, try restarting normally and see if it still works.
If it works in safe mode, then it is likely you have something that is interfering with it.
As another troubleshooting step is to log in as another user. If it works there, then you have something in your particular user setup that is causing the problem. If it doesn't work, then it is a system-wide problem.
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Command-Tab App Switcher doesn't work (related to corrupt .plist file error?)
Hi folks,
The other day, Drive Genius 4 reported on a file corruption: ~/Library/Preferences/System Mac.plist file. I tried to find the file but it didn't appear to exist.
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In Terminal I changed directories and do see the /Mac.plist file under discussion. I suppose I could -rm the file but I’m reluctant without knowing more about what other anomalies might result. The App Switcher is one of the Mac’s best utilities (thanks to er, Microsoft.) If the /Mac.plist file will refresh from the current status, no problem, I would think.
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All best,
DavidFirst, get rid of the worthless, time-wasting "Drive Genius" according to its developer's instructions. Never install any so-called "utility" again.
Don't waste time repairing permissions again, either, unless you have an indication of a permission error involving system files, which you don't and probably never will.
Never delete any file in the shell (Terminal) for any reason.
There is no built-in application called "App Switcher." There is no built-in file named "System Mac.plist" either.
If command-tab application switching still doesn't work after you get rid of "Drive Genius," see below.
Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your documents or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this behavior; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Please take this step regardless of the results of Step 1.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
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The steps in the following Knowledge Base article provide a good step for your issue:
OS X Mavericks: Reset your computer’s PRAM
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Any utilities for changing OS X keyboard shortcuts listed in
http://support.apple.com/kb/ht1343
such as control-tab rather than command-tab for 'Switch application–cycle forward' ?
(Not the same as swapping control key for command key)Safari browser and menu shortcuts:
http://docs.info.apple.com/article.html?artnum=42951
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Since the upgrade Leopard i had a problem with the switching apps shortcut.
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