Apple - Can I disable Dashboard in Mountain Lion?

With macOS 10.10 Yosemite or later, you can go to
System Preferences → Mission Control and switch Dashboard to Off.

On any OS with Dashboard, you can disable it through Terminal with the following command:

defaults write com.apple.dashboard mcx-disabled -boolean YES && killall Dock

It can be re-enabled with:

defaults delete com.apple.dashboard mcx-disabled && killall Dock

If you don't want to use Dashboard at all, free Apps are available to disable & enable (if you wish to revert) it including:

EDIT

Alternatively see also this Youtube tutorial published on August 9th 2013 entitled "Removing the Dashboard (MacMost Now 902)"

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