Today Apple released updates across pretty much their entire product line. While there are no significant new features there are many bug fixes and performance improvements so you will want to upgrade soon.
- OS X 10.11.5 – click the Apple menu > App Store > Updates
- iOS 9.3.2 – tap Settings > General > Software Update
- tvOS 9.2.1 – Click Settings > System > Software Update
- watchOS 2.2.1 – on your paired iPhone tap Watch > Settings > General > Software Update