765      iPhone_iPad_Mac_apple

Mission Control Broken

I am looking for some help getting Mission Control to work. I think that it stopped working after I updated to the newest version of Duet to try and use the Touch Bar feature. However, since then I have uninstalled Duet and Reinstalled the OS.  I don't know why Mission Control won't come back.

I've tried reinstalling the OS, using the "killall Dock" command in Terminal, and force closing the dock in the Activity Monitor. So far I have been completely unsuccessful. 

Any help would be greatly appreciated!

-Skylan999

Having the same problem. Both Mission Control and LaunchPad don't work, even if I try to run their applications. I don't have Duet installed and this happened right after I updated to 10.12.2, so I can definitely say it's the OS X update that broke it.

Same here Sierra 10.12.2 (16C67) - also tried terminal commands etc, nothing works. Mission Control won't launch from launchpad as well, no response at all.

I also have this problem and found that it occurred around the time of the new sierra update (10.12.2). I had duet installed at the time and have recently uninstalled it. Still can't get mission control to work by the use of gestures or any other means. I've tried going to trackpad setting and disabling and re-enabling the gestures but that hasn't working either. Don't know what else to try.

Does it work in Safe Mode?

Try safe mode if your Mac doesn't finish starting up - Apple Support

I've tested in safe mode but the same occurs. No gestures, nor starting from launchpad. I've also been using Duet by the way.

Found the following solution that works for me, from the Duet documentation on a bug where mission control remains disabled.

Open Terminal and enter following commands in succession:

• defaults write com.apple.dock mcx-expose-disabled -bool false
• defaults write com.apple.dashboard mcx-disabled -boolean NO
• killall Dock

Please note that this is just a fix if it's stuck even when Duet is closed. When running duet in background, mission control remains disabled.

I'm not very familiar with terminal. I tried following these steps, but I must be doing something wrong. Is there any way you could give slightly more specific instructions on how to do this quick fix?

Any help would be greatly appreciated!

Same problem macOS Sierra 10.12.2 and tried enabling/disabling Mission Control from System Preferences > Trackpad setting 3 or 4 fingers swipe and nothing, the problem remains, it looks like Mission Control is not even running.

loohuis,

  Applying the terminal settings fixed my problem, and even running duet works as before.

Thanks!

Sweet! This worked for me. Thanks!

skylan999 wrote:

 

I'm not very familiar with terminal. I tried following these steps, but I must be doing something wrong. Is there any way you could give slightly more specific instructions on how to do this quick fix?

 

Any help would be greatly appreciated!

Start the Terminal from the Utilities Folder. Copy and paste in this line…

defaults write com.apple.dock mcx-expose-disabled -bool false

then hit return.

do the same for…

defaults write com.apple.dashboard mcx-disabled -boolean NO

and…

killall Dock

You can then quit the Terminal.

You may have to log out or restart.

Thx for your solution! I can fix this problem after follow these commands!

Restore Mission Control to default settings

To re-enable Mission control by inputting these commands on Terminal:-

defaults write com.apple.dock mcx-expose-disabled -bool false

You should see the following site also:

https://help.duetdisplay.com/faq/124748-duet-was-running-and-i-got-logged-out-of -my-mac

Awesome answer, works perfectly, thanks!

最後更新：2017-10-04 02:35:42

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