„¯\_(ツ)_/¯
If Apple wants to shoot itself in the foot, so be it. We won't work on Metal support just to accommodate their ambitions of competing with Microsoft as the "we're big enough to have our own proprietary graphics library".
So Godot will issue deprecation warnings on macOS 10.14 and that's just fine.
macOS users can be grateful to Valve and Khronos for obtaining the opensourcing of MoltenVK, so that we can use Vulkan on macOS too. If all goes well we should have Vulkan support before macOS 10.15 comes out with potentially no OpenGL support at all. If not, macOS gamers will have to learn how to dual boot Linux
We're working hard to provide good macOS support, but if Apple just keeps breaking compatibility and making sure to only be a second class citizen, we can't fight them. But again, everything should be fine™ thanks to MoltenVK.“
Aka „Fuck you, Apple!“
https://github.com/godotengine/godot/issues/19368
Gruss, Oliver