After some realization about how the MTKView clears the buffer, I changed my system around to only contain one vertex buffer and one index buffer with quads to be sent to the GPU.

Okay so after updating the interface and changing the initialization of Metal it seems things build and link correctly.

The initial problem is fixed now that the Objective C way of Metal is being completely used instead of the C++ way, but now I get an error on the linking of the Objective C C++ mapping when calling Objective C functions from C++ files.

Also if you want to see the implementation it is at https://github.com/fentacoder/pen_engine in the ext/platforms/ios folder, any help is appreciated thank you.