The macOS High Sierra 10.13.4 update packs in several 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. Read the official release notes for detailed information.
Aside from other enhancements and fixes, tvOS 11.3 lets Apple Music members enjoy ad-free music videos in the Music app while owners of the fourth-generation Apple TV are now able to play videos in their original frame rate.
watchOS 4.3 reinstated the ability to browse and control music on your paired iPhone, enabled new features like portrait Nightstand mode, squashed several bugs and fixed more than a dozen vulnerabilities.
In addition to headline-grabbing features like performance throttling, iOS 11.3 packs in a bunch of little things, under-the-hood tweaks and fixes that make this another recommended software update for your iPhone, iPad and iPod touch.