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Part VI: Appendixes > Program Icons Turn to Folders

B.9. Program Icons Turn to Folders

You may remember that in Mac OS X, almost every application, behind the scenes, is actually a folder. All you see (and double-click to open) is one icon called Mail, for example, but inside are dozens of folders, icons, and chunks of software code. The only way you'd ever know that a Mac OS X "application icon" is an optical illusion would be to Control-click the application and, from the pop-up menu, choose Show Package Contents.

Every now and then, though—most often after a power failure—Mac OS X puts on a much more showy display of this feature than perhaps you'd like: Suddenly all applications show up as folders, whose names bear the suffix .app. All very educational, of course, but now you have no way to actually run those programs, because the icon to double-click has disappeared.


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