Change mission control background wallpaper osx lion / mountain lion

This will show you how to change the background wallpaper of mission control in osx lion and mountain lion.

  • open finder
  • goto /System/Library/CoreServices/
  • find the file defaultdesktop.png
  • rename it to defaultdesktop_backup.png
  • copy the image that you want for mission control to the folder and name it defaultdesktop.png
  • open terminal and type
  • killall Dock

now your mission control will have a new background

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