File Type macOS Application Bundle IconmacOS Application Bundle
File Format Standard (developed by Apple)
Usage Open manually; may run a program or script when opened
Popularity ★ ★ ★ ★ ★  Popular

Mac OS X applications have an ".app" extension. They are similar to .EXE files found on Windows computers and contain executable code that runs when the file is opened.

APP files are saved in a package format, which contains the program data and resource files. You can view the contents of an application package in Mac OS X by right-clicking an APP file and selecting "Show Package Contents" from the contextual menu.

Open With

IconApple OS X

Published August 13, 2009
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Information from the PC File Extensions Reference