How to Restart Mission Control in Mac OS X

Nov 23, 2011 - 20 Comments

Restart Mission Control in OS X

If you make any customizations to Mission Control, or if you encounter obvious problems with how Desktops and apps are handled and assigned, you can restart Mission Control without having to reboot the entire Mac.

Forcibly restarting Mission Control is done by killing the Dock, where Mission Control is a child process of, and this is also why when you want to change the Mission Control background image you kill the Dock.

You can kill the Dock in two ways:

  • Using Activity Monitor
  • Using the Terminal

The command line method is much faster if you’re comfortable with, launch Terminal from /Applications/Utilities/ and type the following command:

killall Dock

The Dock and all subprocesses will restart themselves automatically, including Mission Control.

Using the task management tool Activity Monitor is the other option for those who prefer staying within the GU and avoiding the command line:

  • Hit Command+Space to bring up Spotlight and type in “Activity Monitor”
  • In the upper right corner of Activity Monitor, find the search box and type “Dock”
  • Select the process and then click on the big red “Quit Process” button, confirming in the dialogue box by selecting ‘Force Quit’

Again, the Dock and Mission Control will automatically restart themselves.

Whichever method you choose to perform the restart, this can be a great troubleshooting tip if you’re running into peculiarities with graphical artifacts, irregular Desktop Spaces assignments, and other generally buggy behavior within Mission Control.

Thanks for the tip Mike This works in all versions of OS X with Mission Control, from Lion, Mavericks, Yosemite, etc.

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Posted by: Paul Horowitz in Mac OS X, Tips & Tricks, Troubleshooting


» Comments RSS Feed

  1. […] Now kill the Dock to restart Mission Control: […]

  2. Superman says:

    Thanks….fixed my problem

  3. Lucas says:

    Didn’t worked for me. Even when I totally restart my iMac, mission control does not work. I have no idea what to do.

  4. Louches says:

    Thanks, fixed my problem too!

  5. Hobbes says:

    Thanks! This is great!

  6. Kyle says:

    Awesome! This worked for me. Thanks!!

  7. ang says:

    This worked. Thank you so much!!

  8. Lawson says:

    thanks so much, fixed my problem

  9. Edward says:

    This worked fine. Good work guys

  10. VicV says:

    terminal is not helping resolve the issue.i click mission control and nothing happens. i just spent a ton of money on this computer and its 2 days old and i spent an hour on the phone with tech support for a diff issue last night this is getting ridiculous…. is there an actual fix to this annoying problem apple? you have been a thorn in my side for a month fixing my brand new iPhone and now this,WTF!!!!!!!!!!!!!!!!

    • Walrus says:

      Mission Control is a window tiling manager. You don’t need to use Terminal to access Mission Control, and Terminal will do nothing with your iPhone. You could get an iPad instead.

  11. steve says:

    thanks that worked great. now i don’t feel like such an old idiot!
    found the article , followed the directions and voila!

  12. Silvia says:

    Just worked perfectly for me! Thanks!!

  13. Sean says:

    This is the website to follow if your mission control still doesn’t work after killing the dock.

  14. Kimleng says:

    Am I the only where this does not work?

    • dan says:

      To solve this problem apply the following defaults write command:

      defaults write mcx-expose-disabled -bool FALSE

      Restart the OSX Dock:

      killall Dock

      then restart your coputer/ laptop

  15. dan says:

    OMGGG this worked, i tried so many things but this finally worked. Thnx!

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