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Leopard Reference Library: Darwin
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
Is dlopen available on all versions of Mac OS X? (HTML) (日本語 HTML)
QA1180: Describes how to dynamically link to libraries and plug-ins, typically done with dlopen.
Technical Q&As 2008-08-19
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
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
Symbol Variants Release Notes (HTML)
Describes symbol variants, a way of providing multiple versions of symbols for backwards compatibility.
Release Notes 2007-10-16
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
Tiger Developer Overview Series: Developing 64-bit Applications (HTML)
Learn how Mac OS X Tiger breaks the limitations of 32-bit computing.
Articles 2004-12-20
Developing Cross-Platform UNIX Applications with Mac OS X (HTML)
Learn tips for developing code on Mac OS X for deployment on other UNIX platforms.
Articles 2004-08-30
MoreIsBetter (HTML) (DMG) (ZIP)
Library providing indispensable wrapers and workarounds for many areas of Mac OS programming.
Sample Code 2003-10-27
Porting Command Line Unix Tools to Mac OS X (HTML) (日本語 HTML)
TN2071: A general guide for Unix developers porting software to Mac OS X.
Technical Notes 2003-09-03
PIDFromBSDProcessName (HTML) (DMG) (ZIP)
Provides a simple API to do process PID lookup based on BSD process name.
Sample Code 2003-02-13
Moriarity (HTML) (DMG) (ZIP)
Implementing a Cocoa GUI that wraps command-line functionality, calling a UNIX task and presenting the results in a GUI.
Sample Code 2003-01-14
Getting List of All Processes on Mac OS X (HTML) (日本語 HTML)
QA1123: Describes how, using Carbon and BSD respectively, to list all applications and processes.
Technical Q&As 2002-03-05
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
Setting environment variables for user processes (HTML)
QA1067: Tells how to set environment variables for user processes.
Technical Q&As 2001-10-25
Packaging UNIX Software (HTML)
Explains how to post UNIX and other command-line tools to Apple's Macintosh Product Guide.
Guides 2001-04-20
Pascal to C: PROCEDURE Parameters (HTML)
Deprecated - PT31: Nested procedures and PROCEDURE parameters in Pascal when converting them into C or C++.
Technical Notes 1990-02-01