How do I Quit the Finder?
All sorts of ways, but perhaps the simplest is to add (maybe just temporarily) a 'Quit' item to the Finder. (The Finder is actually just an app).
Paste into Terminal:
defaults write com.apple.finder QuitMenuItem -bool yes and hit <return>.
Re-launch the Finder (e.g. by Option-click & hold on the Finder Dock icon). The Finder's ‘
Finder’ menu will now have a "Quit" item (and the usual shortcut of Cmnd-Q).
Having quit the Finder you can bring it back whenever you want just by a click on the Finder's Dock icon – just as you would do to launch any other app that wasn't running.
If you don't want the Finder to permanently respond to Cmnd-Q then, as you can probably guess…
defaults write com.apple.finder QuitMenuItem -bool no
G5 2.1GHz Mac OS X (10.4.7)