Dock

Space

How to add space on dock as an application ?

This command will add a new blank application into your dock.

defaults write com.apple.dock persistent-apps -array-add '{tile-type="spacer-tile";}'

To take it into account, restart your dock

killall Dock

To force start dock, minimise an application

Delay

Fortunately, many hidden options in macOS can be set with a command-line utility called defaults. To trigger the fade-in animation of the Dock immediately you can do the following:

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

After executing this command the Dock needs to be restarted (killall Dock). If you want to switch back to the standard behavior, you can simply delete the corresponding configuration key:

defaults delete com.apple.dock autohide-delay
killall Dock

You can also control the duration of the fade-in and fade-out animation itself. For example, to set the animation duration to half a second, you can enter the following commands.

defaults write com.apple.dock autohide-time-modifier -float 0.5
killall Dock

My default :

defaults write com.apple.dock autohide-time-modifier -float 0.3;killall Doc