.PKG File Extension

.PKG File Extension

File Type 1

Symbian Package File

Developer Nokia
Popularity
4.2  |  555 Votes
Category Settings Files
Format Text

What is a PKG file?

A PKG file is a text file required to build an .SIS installer file, which is used to install applications on devices running the Symbian operating system (OS). It contains installation information in plain text that defines how to build the SIS installer file. PKG files typically include information about the languages supported by the application, vendor name, software dependencies, application files to copy, and details for digitally signing the file to verify its contents.

More Information

You will most likely only encounter Symbian PKG files if you are developing an application for the Symbian OS. The PKG file must be defined by Symbian developers in order to build a single distributable SIS installer file. When the application is ready to be built, developers typically use the "makesis" command, which is part of the CreateSIS utility. Developers may also use the Sisar or Easy SIS Creator applications, which provide a GUI for building SIS files.

Since PKG files are saved in plain text, they can be opened and modified with a text editor, such as Microsoft Notepad or Apple TextEdit, which are bundled with Windows and macOS. If you cannot open the PKG file with a text editor, you most likely have a different type of PKG file. This is due to various file types using the .pkg file extension, which includes the macOS Installer Package and PlayStation Store Download Package formats.

While SIS files are used to install applications, you can unpack the files if you want to view their contents. You can use the free UnSIS tool to unpack SIS files.

NOTE: In 2010, the Symbian Foundation ended and the Symbian OS was discontinued. Nokia eventually stopped accepting software from developers in 2014.

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Programs that open PKG files

Mac
Windows
Linux
Updated February 12, 2020
File Type 2

PlayStation Store Downloaded Package

Developer Sony
Popularity
4.1  |  349 Votes
Category Game Files
Format Binary

What is a PKG file?

A PKG file is a package downloaded from Sony's PlayStation Store, an online content store available on PlayStation consoles since the PS3. It contains a game, add-on, demo, or other content. PKG files are encrypted, and they can be opened only on compatible Sony devices.

More Information

The PlayStation Store allows PlayStation console owners to download purchased games and add-ons, as well as free demos, to their consoles. This content is saved in PKG files.

While most PlayStation owners will never have to manually view or manage their PKG files, some gamers distribute and download PKG files online. To use these files, you must transfer them to a compatible PlayStation console and install them. For example, if you have acquired a PKG file that contains a PS3 game, you must transfer that file to a PS3 and install it.

How to open a PKG file

PlayStation Store PKG files must be transferred to an appropriate PlayStation device to be opened and installed. Often, gamers use homebrew applications to install PKG files they've downloaded online. In most cases, PKG files must be paired with an accompanying RAP file, which contains game licensing information.

Programs that open PKG files

All Platforms
Transfer to the appropriate PlayStation console and install
Updated May 9, 2022
File Type 3

macOS Installer Package

Developer Apple
Popularity
4.1  |  143 Votes
Category Compressed Files
Format Binary

What is a PKG file?

A PKG file is a package of compressed files used to install a macOS application. When you double-click a PKG file, Apple Installer beings installing the application the file contains.

More Information
Screenshot of a .pkg file in Apple Installer
PKG file open in Apple Installer

MacOS applications can be distributed and installed in many different ways. One way developers distribute macOS applications is by packaging them in PKG files, which macOS recognizes as application installers. Each PKG file includes all the files needed to install the application it contains.

How to check what files a PKG file contains

Before using a PKG file to install an application, you may want to check what files the PKG file contains. For example, if you download a PKG file from an online source, you may want to verify that the file does not contain malware.

You can view some PKG files' contents by right-clicking them and selecting Show Package contents. You can also:

What appears when you press CMD + I in Apple Installer
What appears when you press CMD + I in Apple Installer
  • View the files a PKG file contains using the pkgutil --expand command in Apple Terminal
  • View a list of files the PKG file will install by pressing CMD + I on your keyboard during the installation process

NOTE: macOS applications are now more commonly distributed as .APP files.

How to open a PKG file

You can use Apple Installer to install the app a PKG file contains. To do so, either double-click the PKG file, or right-click it and select Open With → Installer.

If you want to view the files your PKG file contains, refer to the How to check what files a PKG file contains section above.

Programs that open PKG files

Mac
Apple Installer
Updated May 5, 2022
File Type 4

Midtown Madness 2 Model File

Developer Microsoft
Popularity
3.9  |  68 Votes
Category 3D Image Files
Format Binary

What is a PKG file?

Game data file used by Midtown Madness 2 (MM2), a 3D racing game; saves a 3D model of a car; located within .AR game archives and can be edited with ZModeler.

Programs that open or reference PKG files

Updated January 29, 2013
File Type 5

CoCreate OneSpace Modeling Package File

Developer Parametric Technology
Popularity
3.8  |  73 Votes
Category 3D Image Files
Format Zip

What is a PKG file?

File created by CoCreate software programs, which are used for 3D modeling; contains the files for a 3D model in a compressed format; used to reduce the size of a model design for transferring over the Internet.

More Information

PKG files in Modeling 2005 or earlier use proprietary and CPIO (.CPIO files) compression. PKG files in Modeling 2006 and later use Zip compression.

NOTE: CoCreate OneSpace Modeling is now known as CoCreate Modeling. It was also previously known as OneSpace Designer Modeling and SolidDesigner.

Programs that open PKG files

Windows
Parametric Technology CoCreate Modeling
Updated March 31, 2010
File Type 6

Midori-OS Application

Developer Autz64
Popularity
2.0  |  3 Votes
Category Game Files
Format Text and Binary

What is a PKG file?

A PKG file is an application that can be run on a Nintendo 3DS or Switch using SmileBASIC and Midori-OS. It contains an app that is written using the BASIC (Beginners' All-purpose Symbolic Instruction Code) programming language and compiled for use with Midori-OS. PKG files are loaded in Midori-OS using the LOAD command and PKG Loader.

More Information

SmileBASIC is a program that allows developers to create BASIC programs on their Nintendo 3DS, Wii U, or Switch. Midori-OS is a mock operating system that SmileBASIC users can install to make creating and executing programs easier. For example, Midori-OS allows users to import and execute precompiled SmileBASIC applications. These applications are saved as PKG files. Midori-OS also allows users to create and load additional PKG files, housing their own SmileBASIC applications.

NOTE: The R-OS Forever and Sakakibara UI SmileBASIC mock operating systems can also load Midori-OS PKG files.

How to open a PKG file

Midori-OS PKG files are meant to be loaded on a Nintendo video game console that has SmileBASIC and Midori-OS installed. They are not meant to be opened on a PC. It is unlikely that you will encounter a Midori-OS PKG file on a PC.

Programs that open PKG files

No programs available
Updated June 14, 2021

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