Here’s some tricks that I use to make the Mac OS X Finder Dock more functional. You’ll need to open Terminal (Applications: Utilities: Terminal).

Separators

These are handy to separate out the different types of Applications you have in your dock. For me, I have all my Internet Apps grouped together and all my design apps in another group. In Terminal, type or copy and paste this (between each step hit the return key):

1. defaults write com.apple.dock persistent-apps -array-add ‘{ “tile-type” = “spacer-tile”; }’
2. killall Dock

Now you’ll see your newly added separator in the Dock. You can click and drag it to where you want and add more if necessary.

Pinning

I’m not a huge fan of having the Dock centered. Most of the Apps I use, like Photoshop or Dreamweaver, have a left justified UI. I’ve found that I prefer to have my Dock “pinned” to the right. Here’s how to do it. In Terminal, type or copy and paste this (between each step hit the return key):

1. defaults write com.apple.Dock pinning
Option 1 – middle – Centered on the Screen.
Option 2 – start – Left Justified
Option 3 – end – Right Justified

I chose to right justify so mine looked like this:
defaults write com.apple.Dock pinning end

2. killall Dock

Make Hidden Apps Transparent

Does exactly what it says. In Terminal, type or copy and paste this (between each step hit the return key):

1. defaults write com.apple.Dock showhidden -bool YES
2. killall Dock

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If you have some, please share them below.