macOS High Sierra 10.13.4 release notes

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.

watchOS 4.3 release notes

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.