I don't have access to an OSX machine anymore(and virtual machines don't properly virtualize Metal 🥺, but I do have a framework in the works that makes my Vulkan plugins work just fine on OSX via Metal!
Vulkan framework for OSX - fantastic, so there is hope :)
Let me know if you need someone to test stuff or help. I could install XCode and remotely give you access to my machine for couple of hours if that would be of any help.