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Package (OS X)

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Title: Package (OS X)  
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Subject: OS X, Windows Installer
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Package (OS X)

Uniform Type Identifier (UTI)
UTI conformation
Container for documents, bundles

In the Apple OS X operating system, a package is a file system directory that is normally displayed to the user by the Finder as if it were a single file. [1] Such a directory may be the top-level of a directory tree of objects stored as files, or it may be other archives of files or objects for various purposes, such as installer packages, or backup archives.


The package is a common file system abstraction used by Apple operating systems, such as OS X and iOS. It is a directory that may contain a hierarchy of files or objects that represent a preserved, organized state. A package is displayed to users like a single file in the Finder application to avoid being changed by the user. However, the content of packages may be accessed through special keyboard and mouse combination events. For this purpose, the control-click, or right-click, menu displays a directive Show Package Contents.[1]

Some documents may be represented as packages:[2]

The Uniform Type Identifier (UTI) for a package is[3]


A package that has a standardized structure for storing executable application code and its associated resources, is called a Bundle.


  1. ^ a b "About Bundles". Bundle Programming Guide.  
  2. ^ "Document Packages". Bundle Programming Guide.  
  3. ^ "System-Declared Uniform Type Identifiers". Uniform Type Identifiers Reference.  
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