You can generally hide any application from the Dock and the application switch list by enabling the
If this key is set to “1”, Launch Services runs the application as an agent application. Agent applications do not appear in the Dock or in the Force Quit window. Although they typically run as background applications, they can come to the foreground to present a user interface if desired.
So, open the application's property list:
… and add the
LSUIElement key to the root of the tree, with a value of
You can get there by right-clicking the application*, selecting Show Package Contents, then opening the
Info.plist file. Ideally you'd do this with Property List Editor.app (that comes with Xcode 3) or Xcode 4 itself. You can also use a simple text editor, since the file is just XML.
After changing the value and saving the file, you should restart your dock:
… or, if you just changed the Finder's properties, relaunch it by right-clicking its icon while holding ⌥, then selecting Relaunch Finder.
A similar approach was also mentioned on LifeHacker recently: Remove Finder from the Application Switcher in OS X **
* Finder is actually in
/System/Library/CoreServices/Finder.app, not in
** It mentions
NSUIElement, for which I find no reference in Apple's Developer documentations. If someone could enlighten me on the difference between those two, go ahead.