While you can expect Mac to take ages before OpenGL goes away, this is almost sure to be removed on next iOS version. This means we probably won’t be able to ship anymore for ios in one year.
Are there any plans for integration of the Metal API in MonoGame?
I’m trying to apply this method, but it’s not working properly yet.
HLSL to SPIR-V
https://translate.google.co.jp/translate?hl=ja&sl=auto&tl=en&u=https%3A%2F%2Fmonobook.org%2Fwiki%2FMacでDirectX_Shader_Compilerをビルドする
SPIR-V to GLSL (or Metal)
https://translate.google.co.jp/translate?hl=ja&sl=auto&tl=en&u=https%3A%2F%2Fmonobook.org%2Fwiki%2FSPIR-VからGLSLを生成する