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Packaging Multiple Items

A metapackage or distribution (both .mpkg) is appropriate when you want to install multiple items in a single install (for example, an application, a framework, and a font). A distribution is more flexible and customizable, but only works in OS 10.4 or later. Both metapackages and distributions are made up of already-built, contained packages along with some metadata.

A metapackage is simpler than a distribution, and contains similar metadata to a normal package.
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A distribution consolidates all of the metadata into an XML and JavaScript file called a distribution script. This gives you more fine-grain control over the user's install experience.
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