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Part IV: Under Mac OS X's Hood > The Defaults System

Chapter 25. The Defaults System

Native Mac OS X applications store their preferences in the defaults database. This is made up of each application's property list (plist) file, which is an XML file consisting of key/value pairs that define the preferences for an application or service of the operating system.

If an application has a plist file, every time you change its preferences, the changes are saved back to the plist file. Also included in the defaults database system are the changes you make to your system via the panels found in System Preferences (/Applications).


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