File extension APP (.APP) information

Windows cannot open APP files?

If Windows is unable to open file extension .APP you may have registry related errors or may not have the appropriate program installed. We strongly recommend that you run a free registry scan.

Appropriate program:

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.. Incorrect associations are the cause of many file extension errors. Scan your system to prevent, identify and repair APP file extension association errors.


  • Performance: To optimize memory and CPU usage for APP files run a free performance scan.
  • Stability: Fix APP errors to make your system and applications more stable.
  • Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.

You are currently viewing the detail page for ABF file extension. This page contains a detailed description of the ABF file type, software tools to help resolve file association errors in the Windows registry together with relevant system utility applications and other related information.