How Can I Change My 2D Dock to a 3D Dock?
With the introduction of Snow Leopard, Apple changed the looked of the Dock from 2D to 3D. The application icons now appear to be sitting on a glass shelf, rather than encased in the Dock. For users that did not enjoy this aesthetic change, a simple Terminal command reverted the Dock to it's pre-10.6 glory. If you wish to revert the Dock back to the Snow Leopard default, another simple Terminal command is required.
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Instructions
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Click "Finder" in the Dock. Select "Go," then "Utilities" in the menu bar. Double-click "Terminal" to open up the command-line utility.
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Type "defaults write com.apple.dock no-glass -boolean NO" and press Enter.
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Type "killall Dock" and press Enter. The Dock will disapear for a moment and reappear as a 3D Dock with application icons appearing to sit on a glass shelf.
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Tips & Warnings
If you've moved your Dock to the left or right side of the screen (rather than changed the look with a Terminal command), it will appear 2D. To enable the 3D Dock once more, simply move the Dock to the bottom of the screen again (in the System Preferences).
