Mac OS X - Turn Off Dashboard
OS X experts tend to agree: Dashboard is a resource hog. Most folks will never notice and, consequentially, will never care. Me? I’ve disabled mine. Here’s how.
1. Open a Terminal window (found under /Applications/Utilities in Finder).
2. At the prompt, type:
defaults write com.apple.dashboard mcx-disabled -boolean YES
killall dock
To re-enable dashboard, just repeat those commands, but replace “YES” with “NO”.
Now, when you’re editing photos or rendering video, you’ll have a small amount more of performance to squeeze out of your system.