File extension APP
| File type | MAC Application Package Or Core System Service Format |
| Developer | Apple |
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What is a APP file?
File with an .APP extension contains a pack of data of an application, executable within Mac OS X, including executable files, application’s resources, PLIST files (properties lists, plugins and icons). It can be initialised by double-clicking . It corresponds to the EXE files in Windows system.
APP files are packs, within Mac OS X their content can be viewed with an option in the context menu of a file. In other systems such files can be displayed as catalogues with their content or they may need to be extracted with an archiving program. In order to maintain proper functioning of an APP program, the content of the pack should not be modified manually.
Program(s) that can open the .APP file
How to open APP files
If you cannot open the APP file on your computer - there may be several reasons. The first and most important reason (the most common) is the lack of a suitable software that supports APP among those that are installed on your device.
A very simple way to solve this problem is to find and download the appropriate application. The first part of the task has already been done – the software supporting the APP file can be found in the table. Now just download and install the appropriate application.
Possible problems with the APP format files
The inability to open and operate the APP file does not necessarily mean that you do not have an appropriate software installed on your computer. There may be other problems that also block our ability to operate the MAC Application Package Or Core System Service Format file. Below is a list of possible problems.
- Corruption of a APP file which is being opened
- Incorrect links to the APP file in registry entries.
- Accidental deletion of the description of the APP from the Windows registry
- Incomplete installation of an application that supports the APP format
- The APP file which is being opened is infected with an undesirable malware.
- The computer does not have enough hardware resources to cope with the opening of the APP file.
- Drivers of equipment used by the computer to open a APP file are out of date.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the APP file should operate with your programs without any problem. If the problem with the APP file has not been solved, it may be due to the fact that in this case there is also another rare problem with the APP file. In this case, the only you can do is to ask for assistance of a professional staff.
Similar extensions
| .a6p | Adobe Authorware Application Format |
| .action | Mac OS X Automator Action Format |
| .actm | Autodesk AutoCAD Action Macro Format |
| .ahk | AutoHotkey Script Format |
| .air | Adobe AIR Rich Internet Applications |
| .apk | Google Android Package Format |
| .app | MAC Application Package Or Core System Service Format |
| .applescript | AppleScript Script Format |
This extension
can be converted to:
How to associate the file with an installed software?
If you want to associate a file with a new program (e.g. my-file.APP) you have two ways to do it. The first and the easiest one is to right-click on the selected APP file. From the drop-down menu select "Choose default program", then click "Browse" and find the desired program. The whole operation must be confirmed by clicking OK. The second and more difficult to do is associate the APP file extension to the corresponding software in the Windows Registry.
Is there one way to open unknown files?
Many files contain only simple text data. It is possible that while opening unknown files (e.g. APP) with a simple text editor like Windows Notepad will allow us to see some of the data encoded in the file. This method allows you to preview the contents of many files, but probably not in such a structure as a program dedicated to support them.