Document Revision History

This table describes the changes to Kernel Extension Programming Topics.

Date	Notes
2010-09-01	Added information about codeless kexts.
2010-03-19	Restructured and updated for OS X v10.6.
2007-10-31	Changed title from "Kernel Extension Concepts." Updated debugging instructions to better explain how to generate symbol files on the host machine.
2007-06-08	Updated kernel debugging information for OS X v10.5.
2007-04-03	Added links to KPI usage information and consolidated permissions and ownership information into a separate article.
2006-10-03	Updated for Xcode 2.4 and added guidelines for using IOMatchCategory.
2006-05-23	Updated the PackageMaker information and added information about the use of the NVRAM variable pmuflags while debugging.
2006-02-07	Updated instructions for enabling kernel debugging on Intel-based Macintosh computers and for editing property list files in Xcode.
2005-10-04	Corrected version information for alternate debugger keystroke.
2005-09-08	Added information about debugging KEXTs on Intel-based Macintosh computers.
2005-08-11	Added information about kernel programming interfaces.
2005-04-29	Added description of new way to break into kernel debugging mode in OS X v. 10.4.
2005-03-03	Kernel subcomponent version information added for OS X versions 10.3.4 through 10.3.7.
2004-02-25	Converted KEXT Tutorials HOWTO documents to Kernel Extension Concepts programming topic. Updated tutorials to use Xcode 1.1 on OS X version 10.3.