When was the last time you opened Dashboard? If you’re like me you never used Dashboard. Dashboard is the kind of thing you either love or hate, using the widgets constantly or not at all.
Unfortunately even if you never opened Dashboard and/or you do not have a single widget in it its process will stay in background reducing usable free RAM memory and also CPU will be used quite often and your battery may last a bit less as a result. If you want to avoid that I will show you how to disable it.
This trick works in all versions of OS X that have Dashboard, including Leopard, Snow Leopard, Lion, Mountain Lion, and Mavericks. Turning Dashboard off and on is done easily through the Terminal, so your first step is to launch the Terminal app which is found in the /Applications/Utilities/ folder. Type or paste the following exactly into the Terminal window and press enter:
defaults write com.apple.dashboard mcx-disabled -boolean YES
Next, kill the currently running Dashboard by killing the Dock (the Dock will reload itself, don’t worry):
That’s it, now Dashboard is completely disabled and now your Mac as a bit more of free RAM memory to use for your useful applications instead [and battery will last a bit longer too].