Well, the unfortunate part about Metal is that it’s incompatible with the rest of the world, too. They could’ve integrated Vulkan and chose to do something slightly different instead, because that’s the way the Apple crumbles, I guess.

There is MoltenVK, which is a compatibility layer to be able to run Vulkan games on macOS. Maybe they’ll integrate that. But well, it wouldn’t be on-brand, and it certainly still doesn’t make it easier for gamedevs looking to support macOS.