Disable Autohide Dock displaying slowly when in fullscreen
Completely remove or minimize HyperDock delay

How to auto hide the dock and remove its delay on the Mac


Open Terminal
Copy and paste the following command into a Terminal window:


==UPDATED CODES==

defaults write com.apple.Dock autohide-delay -float 0 &amp;&amp; killall Dock


To restore the default behavior, enter:

defaults delete com.apple.Dock autohide-delay &amp;&amp; killall Dock

If you don't want to remove the delay altogether, but just want to shorten it, you can play around with the number after the -float option. For me, this is a good fit: 

defaults write com.apple.Dock autohide-delay -float 0.05 &amp;&amp; killall Dock