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

Apple Applications Resources
A guided introduction and learning path for developers writing code that interacts with Apple applications.   Descriptions of procedural C and Objective-C programming interface elements to Apple's applications.
Apple Applications Topics
Apple's full-featured mail client with an integrated address book.   The default web browser for Mac OS X.   A Mac OS X application that retrieves and displays custom information in content-specific windows.

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including technologies, features, products, APIs, and programming techniques that are no longer supported or have been superseded.