On March 30, 2018, Apple released the major macOS High Sierra 10.13.4 software update for Mac with under-the-hood tweaks, a bunch of security fixes and some feature additions, including better support for external GPUs, Business Chat in Messages and more.
On March 29, 2018, Apple released the tvOS 11.3 software update, bringing the ability to play videos in their original frame rate to owners of the fourth-generation Apple TV, plus other improvements such as ad-free music videos for Apple Music members right in the Music app.
On March 29, 2018, Apple released the watchOS 4.3 software update for Apple Watch. Among other improvements and fixes, watchOS 4.3 reinstates the ability to browse music on your paired iPhone via your wrist while enabling new features like portrait Nightstand mode.
On Thursday, March 29, 2018, Apple released the iOS 11.3 software update for iPhone, iPad and iPod touch with battery health assessment in Settings, the ability to disable Apple's controversial CPU throttling at will and other new features.
On December 6, 2017, Apple released macOS High Sierra 10.13.2 to the public following a month of testing. The free software update brought under-the-hood enhancements, but no new user features or other outward-facing changes were added in the release.
On December 5, 2017, Apple released the watchOS 4.2 software update, bringing the new Apple Pay Cash peer-to-peer payment feature to your wrist and adding other new capabilities.
Released on December 4, 2017, the tvOS 11.2 software update brought a pair of new HDR viewing options for Apple TV 4K owners along with access to a brand new Sports tab within Apple's TV app and assorted under-the-hood changes and fixes.
Aside from nearly two-dozen bug and security fixes and various under-the-hood improvements, iOS 11.2 brings support for the faster 7.5W wireless charging on iPhone 8, iPhone 8 Plus and iPhone X and the Apple Pay Cash peer-to-peer payment feature.
October 31, 2017, Apple released iOS 11.1, its first major software update for the compatible iPhone, iPad and iPod touch models following the initial iOS 11.0 release in September 2017.
Apple released watchOS 4.1 publicly on October 31, 2017.
macOS High Sierra 10.13 was released in September 2017 with new features and under-the-hood enhancements that make your Mac faster and more reliable while laying the foundation for future macOS innovation.