OSX 10.8 Mountain Lion does not give you the option to quit the Finder by default. This can be annoying if you want to hide your desktop icons and concentrate on current the task in hand.
You can add the Quit option to Finder menu with the following terminal commands:
defaults write com.apple.finder QuitMenuItem 1
If you want to remove it again use the following:
defaults write com.apple.finder QuitMenuItem 0
OSX’s Dashboard provides a screen of small applications (widgets) which appear when you hit F4 or utilise various other access methods. You can free up memory by disabling Dashboard.
To turn off/disable Dashboard from the command line:
defaults write com.apple.dashboard mcx-disabled -bool YES
To turn it back on again:
defaults write com.apple.dashboard mcx-disabled -bool NO
The Automatic Termination Daemon is a feature of OSX Mountain Lion which is used to automatically terminate the execution of certain applications once their viewing window is closed. It’s debatable as to weather or not this feature is necessary, and if you want to turn it off to save some RAM you can do so with the following command in the terminal:
defaults write -g NSDisableAutomaticTermination -bool YES
If you want to turn it back on again use this:
defaults write -g NSDisableAutomaticTermination -bool NO