Vulkan is not supported on iOS / MacOS, which is the major benefit to this release.
Khronos maintains MoltenVk though, which is as "official" as it gets: https://github.com/KhronosGroup/MoltenVK
...technically, Vulkan on Windows is also only supported via 3rd-parties (the GPU vendors), so the situation isn't actually all that different. The "Vulkan driver" is just bundled with the application on Mac instead of installed separately.