Geometry Shader on OSX

Hi,

How to write geometry shaders under OSX? Is it even possible?
I have code with a geometry shader which works on my OSX system but its written in openframeworks.
I wanna find out how to make the same thing in unity.

Basically I just have to draw some lines on GPU but I have to process them with geometry shader first.
How to pass a set of vertices to a geometry shader as lines?

I only found a way with Material.SetBuffer and then using StructuredBuffer inside shader - but it seems it doesnt work under OSX.

 

ok ... it actually works on OSX. but ComputeShaders dont. thank you Apple

 

@Horz hi, could you please show me how you did it, i keep getting a pipeline error when trying to run a geometry shader on my mac.
Metal: Error creating pipeline state (Custom/Geom_Grass): Vertex attribute POSITION0(0) is missing from the vertex descriptor
with every single one i write i get this, while they all work on PC...?

 

@jister i didnt have this. i doubt its related to osx. did u try to add position attribute?