With the new features and capabilities that watchOS 2 brings to WatchKit, your apps can integrate even more closely with Apple Watch. Take advantage of the Digital Crown, microphone, Taptic engine, and health sensors to take your Apple Watch app to the next level. And with ClockKit, you can extend your app to the clock face with Complications.
See what’s new in watchOS
iOS 9 SDK includes new APIs and services that are enabling new categories of apps and features. Multitasking and gaming APIs help enhance app functionality and create immersive games. Expanded search capabilities, and new support for CloudKit, HomeKit, HealthKit, and MapKit extend iOS to more places than ever before.
See what’s new in iOS 9
OS X El Capitan
OS X El Capitan brings Metal to Mac, giving your apps unprecedented graphics and computing power. New extensibility APIs let your Mac apps work seamlessly with Photos and Safari.
See what’s new in OS X El Capitan