Speed up Mission Control animations in macOS Sierra

Solution 1:

Aidan Marr is correct. BetterTouchTool can be used to get the old behaviour.

First, disable three finger swipe up in System Preferences > Trackpad.

Then, use BetterTouchTool as follows:

1. Select the "Trackpads" tab at top and "Select Application:" "Global" at left.
2. Click "Add New Gesture"
3. Select "Three finger swipe up" as your gesture and "Mission Control" as your action.

The old behaviour is now restored and you will be able to use:

defaults write com.apple.dock expose-animation-duration -float 0.1

Note, that you can use a similar process for "App Exposé"

Bonus Tip: Since "Mission Control" is still a standalone App on your system you could use the utility of your choice to invoke it. For example, you could have Keyboard Maestro invoke it with a particular keystroke. Invoking the app this way uses the old (pre-Sierra) behaviour.

Solution 2:

Here's a quick list of animation-related tweaks for macOS Sierra.

Don’t animate opening applications from the Dock

defaults write com.apple.dock launchanim -bool false

Speed up Mission Control animations

defaults write com.apple.dock expose-animation-duration -float 0.1

Remove the auto-hiding Dock delay

defaults write com.apple.dock autohide-delay -float 0

Remove the animation when hiding/showing the Dock

defaults write com.apple.dock autohide-time-modifier -float 0

Increase window resize speed for Cocoa applications

defaults write NSGlobalDomain NSWindowResizeTime -float 0.001

Once done, you'll need to killAll Finder && killAll Dock to restart those programs.

You can find a lot more by searching for "dotfiles", and the source for the changes above (as well as many, many more) can by found in this particular dotfile by Mathias Bynens.