Dealing with Apple isn't something Valve would want. They focus on Vulkan, Mesa and Wine. And Apple are pretty negative about Vulkan for some unknown reason (wh

Dealing with Apple isn't something Valve would want. They focus on Vulkan, Mesa and Wine. And Apple are pretty negative about Vulkan for some unknown reason (which seems to be even more than their usual NIH mentality). I.e. like when they were resisting adopting SPIR-V for the Web. So Apple have no one to blame but themselves for it.