Open Source

Open source software is at the heart of Apple platforms and developer tools, and Apple continues to contribute and release significant quantities of open source code.

Swift

Swift is a powerful and intuitive programming language designed to give developers the freedom and capabilities they need to create a new generation of cutting-edge apps. Swift is easy to learn and use and it’s open source, so anyone with an idea can create something incredible.

Visit Swift.org

WebKit

WebKit — the open source rendering engine introduced by Apple — powers Safari on OS X and iOS. WebKit features blazing performance and extensive standards support. And because it’s open source, developers can examine WebKit code and contribute to the community.

Visit WebKit.org

ResearchKit

ResearchKit is an open source framework that enables an iOS app to become a powerful tool for medical research. It includes a variety of customizable modules that you can build upon and share with the community.

View the ResearchKit Open Source Project

CareKit

CareKit is an open source framework for developing apps that help people better understand and manage their health by creating dynamic care plans, tracking symptoms, connecting to care teams, and more.

Visit CareKit.org

Bonjour

Bonjour enables automatic discovery of devices and services on a local network using industry standard IP protocols. It makes it easy to discover, publish, and resolve network services with a sophisticated, yet easy-to-use, programming interface.

Learn more about Bonjour

UNIX

OS X combines a proven UNIX foundation with the easy-to-use Mac interface to bring industrial-strength computing to the desktop.

View Unix Documentation

Command Line Tools

Download command line developer tools, including Apple LLVM compiler, linker, and Make.

Open Source Projects

View iOS, OS X, and developer tool open source projects.

Documentation

View open source related documentation.