Document Revision History

This table describes the changes to Security Overview.

Date	Notes
2012-12-13	Made additional editorial changes throughout.
2012-09-19	Made minor editorial fixes.
2012-06-11	Made minor typographical fixes.
2012-03-06	Corrected minor errors in the bibliography.
2012-01-09	Introduces computer security concepts.
2011-07-06	Added information about sandboxing.
2010-07-13	Reorganized file system permissions into a single section and enhanced the content.
2008-10-15	Added a link to the iOS Technology Overview.
2008-06-26	Added information about security in iOS.
2008-02-08	Added descriptions of new features for OS X v10.5.
2005-04-29	Updated for OS X v10.4. Added information about file-system access control lists (ACLs). Changed "Rendezvous" to "Bonjour."
2004-02-23	New document that introduces computer security concepts and describes the security features and APIs in OS X.