Main view does not work on Mojave

[lerno]

When using Xcode 10 and linking against Mojave frameworks, the OpenGL main view refuses to render at all.

I've tried the suggestions mentioned online (running an [OpenGLContext update], setting the view on OpenGLContext) but with no success at all.

Incidentally I have a game running on a heavily modified Cocos2D fork and THAT ONE is working on Mac OS X. Even though pretty much the same code in the CocosBuilder doesn't! I have compared the two and I can't see any meaningful differences.