Well, this just dropped: https://www.khronos.org/news/press/vulk ... -platforms

One Vulkan Renderer is now sufficient for all three platforms..

SDL also added support for Vulkan on MacOS: https://twitter.com/sdl_commits/status/ ... 1947165696

Please don't split the renderer. This just causes either more work for you or one renderer to be favored while the other runs bad and/or with bugs.
Please. think about OpenGL 4.5 only or Vulkan.