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Leopard Reference Library: Open Source
Apple provides tools and programming interfaces to help move UNIX code to Mac OS X, where developers can take advantage of advanced features such as the Aqua user interface, the Quartz graphics system, and Bonjour networking.

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Porting Drivers to Mac OS X (HTML) (PDF)
Tips and code samples to help UNIX/Linux device driver developers bring their drivers to Mac OS X.
Guides 2009-05-06
Dynamic Library Programming Topics (HTML) (PDF)
Explains how to design, implement, and use dynamic libraries.
Guides 2009-02-26
Universal Binary Programming Guidelines, Second Edition (HTML) (PDF)
Conceptual information and tips for writing code that runs on PowerPC-based and Intel-based Macintosh computers.
Guides 2009-02-04
System Startup Programming Topics (HTML) (PDF)
Explains the boot process used to initialize the Mac OS X operating system.
Guides 2008-11-19
File System Overview (HTML) (PDF)
Conceptual information and guidelines describing the structure and usage of the Mac OS X file system.
Guides 2008-07-11
Runtime Configuration Guidelines (HTML) (PDF)
Conceptual and reference information for dynamically configuring your software.
Guides 2008-07-08
Mac OS X Man Pages (HTML)
HTML versions of the Mac OS X, Mac OS X Server, Xcode Tools, and CHUD man pages.
Reference 2008-04-29
64-Bit Transition Guide (HTML) (PDF)
Describes the 64-bit features available in Mac OS X.
Guides 2008-04-08
Porting UNIX/Linux Applications to Mac OS X (HTML) (PDF)
Conceptual information and tips about porting UNIX and Linux applications to Mac OS X.
Guides 2008-04-08
Strings Programming Guide for Core Foundation (HTML) (PDF)
Explains how to create, manipulate, and search strings in Core Foundation, and how strings interact with encodings and character sets.
Guides 2008-03-11
Perl, Python, and Ruby Extensions Release Notes (HTML)
Describes how to create universal binary extensions for Perl, Python, and Ruby.
Release Notes 2007-10-31
Compiling X11 / OpenGL applications on Mac OS X v.10.5 Leopard (HTML)
QA1567: Trying to compile X11 / OpenGL application on Mac OS X v.10.5 result on "ld: cycle in dylib re-exports with /usr/X11R6/lib/libGL.dylib""
Technical Q&As 2007-10-30
Core Foundation Reference Update (HTML) (PDF)
Summarizes the symbols added to the Core Foundation framework.
Release Notes 2007-07-18
MultiprecisionFP (HTML) (DMG) (ZIP)
How to utilize the gmp and arprec multiprecision floating point packages on Mac OS X
Sample Code 2007-03-26
Data Formatting Guide for Core Foundation (HTML) (PDF)
Explains how to use Core Foundation formatters to create and validate text in text fields and other cells.
Guides 2006-12-21
Building Universal Binaries from "configure"-based Open Source Projects (HTML)
TN2137: Describes some methods for building some existing "configure"-based Open Source packages as universal binaries.
Technical Notes 2006-10-05
Building an Open Source Universal Binary (HTML)
Learn to build a universal binary through this sample build that uses OpenSSL.
Articles 2006-04-24
Bundle Programming Guide (HTML) (PDF)
Explains how to use Core Foundation bundle objects to organize resources.
Guides 2005-11-09
Dates and Times Programming Guide for Core Foundation (HTML) (PDF)
Explains how to manage Core Foundation dates and times.
Guides 2005-08-11
Multiple User Environments (HTML) (PDF)
Explains the system's user environment and gives guidance on writing programs for that environment.
Guides 2005-07-07
Creating Cross-Platform Applications with Core Foundation and Open Source (HTML)
Learn how to import and export data types across a range of platforms using CF-Lite.
Articles 2005-04-11
Plug-ins (HTML) (PDF)
Explains how to use the plug-in architecture provided by Core Foundation.
Guides 2005-03-03
Collections Programming Topics for Core Foundation (HTML) (PDF)
Explains how to group objects in arrays, sets, or dictionaries in Core Foundation.
Guides 2003-08-07
X11CallCarbonAndCocoa (HTML) (DMG) (ZIP)
Demonstrates a double clickable X11 application which performs various "native" Mac OS X operations.
Sample Code 2003-07-28
Debugging Programming Topics for Core Foundation (HTML) (PDF)
Tips and techniques for debugging Core Foundation code.
Guides 2003-01-17
MP3 Player (HTML) (DMG) (ZIP)
How to wrap a command-line UNIX/Linux application in a Cocoa GUI, calling a the command-line app through NSTask.
Sample Code 2003-01-14
Static linking of user binaries on Mac OS X (HTML) (日本語 HTML)
QA1118: Explains why static linking of user binaries is not supported on Mac OS X, and possible workarounds.
Technical Q&As 2002-02-07