The File Extensions Database

.APP File Extension

  • Developer by: Apple
  • Category: Executable Files

What is an .APP file?

.APP is Mac OS X Application

An app file is an application bundle that runs under Mac OS X. APP files are executable files similar to .EXE files in Windows and run when double-clicked.

Because APP files are Mac OS packages, you can right-click (or control-click) an application and select "Show Package Contents" to view the files contained in the package. These include Resources used by the application, executables, property list (.PLIST) files, frameworks, plugins, icons, and other files.

In Windows and Linux systems, it may be possible to view the contents of a Mac OS X application as if it were a folder. A decompression program like WinRAR may also be able to extract files from a Mac OS X application on other operating systems.

NOTE: Files within an application package should not be edited or moved, since changes may prevent the program from running correctly.

Programs that open Mac OS X Application
Apple OS X
File Type 2 FoxPro Generated Application
Category: Executable Files

Application used by FoxPro to automate procedures (i.e. creating new label sizes, transforming data values, analyzing code, etc); may be included with FoxPro or custom built by the user from a project (.PJX) file using the BUILD APP command

Programs that open FoxPro Generated Application
Microsoft Visual FoxPro
File Type 3 Symbian OS Application
Developer by: Nokia Category: Executable Files Format: Binary

Software program written for the Symbian OS, an operating system for mobile phones and smartphones; comprises a Symbian application together with a .RSC resource file; can be compiled using a Symbian OS software development kit (SDK).

The Symbian OS is used by phones from Nokia, Sony Ericsson, Samsung, and FOMA.

How to solve problems with APP files

  • Associate the APP file extension with the correct application. On :
    Windows: Right click on any APP file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.APP files". Mac: Right click (or Ctrl-click) the APP file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .APP is Mac OS X Application. Because only the current version supports the latest APP file format. Search, therefore, e.g. on the Apple manufacturer website after an available .APP is Mac OS X Application update.
  • To make sure that your APP file is not corrupted or virus-infected, get the file again and scan it with antivirus software.