OS X El Capitan for Developers

OS X El Capitan brings Metal to Mac, giving your apps unprecedented graphics and computing power. With Swift 2.0, you can write even better code thanks to advanced new features. And new extensibility APIs let your apps work seamlessly with Photos and Safari.

Metal APIs

New to Mac, Metal provides super-efficient access to the power of the graphics processor, enabling you to maximize the graphics and compute potential of your app. With a streamlined API, precompiled shaders, and support for efficient multi-threading, Metal is optimized to allow the CPU and GPU to work together to enhance performance and deliver richer graphics, opening up new possibilities for games and graphics-intensive apps. The new MetalKit framework makes it even easier to integrate Metal into your application by providing essential APIs for controlling drawing and loading graphic assets.

Learn more about Metal

Force Touch APIs for Safari

The recently introduced Force Touch trackpad that brought a new level of interactivity and control for your Mac apps is now available for your websites.

Learn more about Force Touch

App Extensions for Photos

Create app extensions that give users access to your custom filters and editing tools directly from within the Photos app on Mac.

Swift 2

Swift is an innovative programming language with modern features that produces safe, lightning-fast applications for OS X, iOS, and watchOS. Swift 2.0 builds on the incredible popularity and power of Swift, delivering features that help you write even better code, including advanced error handling, availability checking, and lots of enhancements to syntax. And apps written in Swift will reach an even larger audience later this year when Apple releases Swift 2.0 as open source.

Learn more about Swift

New Technologies for Safari

With OS X El Capitan, Safari brings new tools and capabilities that let you create a better surfing experience with the Safari web browser..

Shared Links Extensibility. Use the new Shared Links API extension to add link suggestions to the shared links feed on Safari for OS X and iOS.

Content Blocking API for Safari extensions. Easily block content from a large collection of webpage resources with minimal overhead and incredibly high performance.

Force Touch Trackpad Mouse Events. Create interactivity like never before using new events and force information from the Force Touch Trackpad.

CSS Scroll Snapping. Use CSS scroll snapping to keep the focal point of your content in view when scrolling momentum stops.

FairPlay Streaming. Stream premium web video content securely with FairPlay Streaming support in Safari on OS X.

AirPlay for HTML5 Video. If you use custom controls for your HTML5 media, use JavaScript AirPlay support to add your own control to stream video to Apple TV.

HTML5 Video PiP. Use new JavaScript PiP support for iOS to add your own Picture in Picture control to custom controls for HTML5 videos.

Backdrop Filters. Add advanced image filters to the backdrop of your elements to achieve modern iOS and OS X material effects in your web content layouts.

Learn more about Safari for Developers

OS X El Capitan and Xcode 7

Download the latest version of OS X and Xcode to start building apps with the OS X 10.11 SDK.

Download Xcode 7

WWDC Session Videos

Watch and learn from our engineers as they show you how to bring the best of Apple technologies to your apps.

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Find a comprehensive set of programming guides, reference, and sample code for OS X.

View guides and sample code