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Leopard Technical Notes
Apple provides APIs, file format specifications, and other resources to provide developers with opportunities to interact with and extend various Apple applications.

A guided introduction to writing code that interacts with Apple applications.   Essential information for developers integrating their code with Apple's applications.   C and Objective-C API references organized by framework.
Apple Applications Topics
An application for displaying and managing desktop utilities, called widgets.   Software for video editing, compositing, and real-time effects.   Software for media asset management and workflow automation.

Software for downloading images from a digital camera or scanner.   Apple's digital jukebox software for Mac OS and Windows.   An application supporting music composition, notation, and audio production.

A development tool for creating motion graphics compositions.   The advanced web browser for computer desktops and iPhone.  

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including technologies, features, products, APIs, and programming techniques that are no longer supported or have been superseded.