Apple has released a plethora of software updates for iTunes, OS X, iOS, watchOS and tvOS.
iTunes 12.4 for OS X sports a redesigned interface that’s designed to be simpler. It also hopefully resolves an issue that could cause music stored in iTunes to be deleted. iTunes 12.4 can be downloaded at the Mac App Store.
Mac OS X 10.11.5 offers bug fixes and security enhancements. It’s also available at the Mac App Store.
iOS 9.3.2 focuses mainly on under-the-hood performance improvements and bug fixes. You can download it at the Apple App Store or via the General/Software Updates component of the Settings app.
tvOS 9.2.1 and watchOS 2.2.1 are designed to deal with various bugs. The tvOS update can be found in the fourth-generation Apple TV's settings app. Apple Watch updates are installed through the iOS Watch app on a connected iPhone.