In my opinion, the Dashboard is probably the stupidest feature in OS X. It’s ugly, clanky and somewhat useless. It also takes up valuable system resources that would be better used elsewhere. I did a bit of research and discovered that it’s actually pretty easy to turn off.
Simply open up Terminal and type:
defaults write com.apple.dashboard mcx-disabled -boolean YES
For the changes to take effect you’ll need to restart the Dock:
If you ever change your mind and want the Dashboard back, simply type:
defaults write com.apple.dashboard mcx-disabled -boolean NO
Again, you’ll need to restart the Dock: