When you open and close Launchpad it will normally fade-in and fade-out. This tweak disables the fade effect so that Launchpad will show and hide immediately.
Start a new Terminal session (in Finder click Applications > Utilities > Terminal).
To set this to Disabled, type (or copy and paste) the following commands:
defaults write com.apple.dock springboard-show-duration -integer 0
defaults write com.apple.dock springboard-hide-duration -integer 0
To reset this setting to the default value, type (or copy and paste) the following commands:
defaults delete com.apple.dock springboard-show-duration
defaults delete com.apple.dock springboard-hide-duration
To activate this tweak immediately, type the following command, or wait until the next reboot:
Close the Terminal session by typing
exit at the prompt.
Disclaimer: Making any changes to your system can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from these modifications can be resolved. Please follow the instructions carefully and use the information provided at your own risk.