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Mac OS X has a fantastic feature that enables you to play window effects in slow motion by holding down the Shift key while playing the animation (like minimize, maximize, Exposé, etc...)

As a matter of fact, I don't like it! :)

How can I disable it?

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Cool - didn't know about that. And +1 for asking in a positive way. – Andrew Grimm Feb 10 '11 at 11:44

Open up


defaults write FXEnableSlowAnimation -bool false

If you want to go back, use:

defaults write FXEnableSlowAnimation -bool true

You'll need to restart the Finder after running the command.

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Sorry... it did not work. Maybe it doesn't works on Snow Leopard. – Daniel Silveira Mar 20 '10 at 17:47
Agreed, it did not work for me when i tried to disable the slow animation for expose on snow leopard – emmby Apr 26 '10 at 15:16
Eh.. didn't work for me either, Lion 10.7.4 – Pavel Alexeev Jun 4 '12 at 9:48
no workie, mountain lion – Peter Ehrlich Nov 16 '13 at 2:56
no workie, yosemite – mcmlxxxiii Jan 28 '15 at 2:07

At least for me, in Yosemite 10.10.3, the following answer from our friends at Ask Different worked:

You can disable the hotkeys for slow motion effects by following these instructions:

  1. Open Terminal

  2. Go to ~/Library/Preferences by typing cd ~/Library/Preferences.

  3. Write open and press Enter.

  4. A window similar to this will open:

XCode PList Editor

  1. For items 34, 35, and 37, set enabled to NO.

  2. Restart your system.

  3. Enjoy.


  1. MacWorld
  2. In Translation
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