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Release notes provide late-breaking news and highlights of new or changed features in the latest release.

View the complete Release Notes List.
Application software from Apple that other products can interact with and extend.   The Mac OS X native scripting language.   Programming interfaces for recording, processing, playing, and creating sound content.

A set of C APIs for developing applications for Mac OS X.   Object-oriented frameworks for developing applications for Mac OS X.   A framework providing basic software services to programs and application environments.

The open source foundation of Mac OS X, based on 4.4BSD UNIX.   Mac OS X technologies essential to game developers.   Programming interfaces for creating 2D, 3D, and PDF content.

Resources for developing for different text systems and other locale-specific features.   Technologies for developing web server and client applications, and web content.   An environment for developing cross-platform applications. Java is built into Mac OS X.

Indispensable Reference Library resources that describe Mac OS X at a high level.   Resources for working with Apple's server platform.   Protocols and services that support networking and communication capabilities.

Open source technologies, programming languages, servers, and toolkits.   Support for improving code and hardware performance.   A cross-platform technology for creating, delivering, and playing multimedia content.

Routines for working with strings and fonts, and for rendering glyphs.   A suite of developer tools, including Xcode and UNIX tools.   The look and feel of Mac OS X application software.

View legacy technologies, including technologies, features, products, APIs, and programming techniques that are no longer supported or have been superseded.