File Extension APP

File type: Mac OS X Application File

About the APP file type:

If Windows cannot find the appropriate program associated with .APP files, then your registry may have errors. Check your Windows registry for errors (includes file association errors).

The .APP file extension identifies Mac OS X Application files: these are essentially the equivalent of .EXE file on Windows, in that when double clicked they execute the application. As an executable file it is important to ensure that the file is not a virus, or some other malicious code, and that you trust the file's source.

Additional Information:
To execute a .APP application you will first need to ensure that the file is saved on a Mac computer, then simply double click on the file. APP file are also used as executables on certain mobile phones and also for Microsoft Visual FoxPro.