How to Make Dock Transparent

Open Terminal and type

defaults write com.apple.dock hide-mirror -bool true; killall Dock

Revert to default

defaults write com.apple.dock hide-mirror -bool false; killall Dock

A temporary solution against the solid white background of Mavericks’s dock on left or right.

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How to Auto-Hide Dock Immediately

To remove dock auto-hiding animation latency immediately, key in the following in Terminal:

defaults write com.apple.dock autohide-time-modifier -int 0;killall Dock

To restore it, key in the following:

defaults delete com.apple.dock autohide-time-modifier;killall Dock