Yet another new feature in Mac OS X Lion, Mission Control transitions with an animated shrinking and growing of the current Space, showing all the other Spaces and open app windows for easy control over all the display options. If you feel like this transition could use a bit of a speed boost, try this easy tip.
To speed things up, simply open Terminal, and type or copy/paste the following:
defaults write com.apple.dock expose-animation-duration -float 0.15
Then use the by now familiar restart Dock command:
Launch Mission Control from the Dock for with a three fingered swipe (enabled in System Preferences) to see the difference. If you want a shorter animation speed, use a smaller number after the -float flag, like 0.1 or so. You could potentially slow it down with a number bigger than the default (probably .2 or .3), but why would you want to? You’re all about productivity, baby!
Want to disable the transition altogether? Well, it’s your choice, so go ahead and use 0 for your -float flag, like so:
defaults write com.apple.dock expose-animation-duration -float 0
Remember to restart the Dock and the transition will be gone, making for one oddly disturbing insta-Mission Control. Want to put it all back? Use this handy-dandy all-in-one Terminal command:
defaults delete com.apple.dock expose-animation-duration; killall Dock
The end! A big thanks to the fine folks at OSXDaily for this one..