How to make grass on a mesh on a m1 mac?

Hello! I've recently created a procedurally generated island mesh and now wondering how to put grass on it. I have spent the past 5 weeks trying to solve this problem but have not got anywhere yet. I am on one of the new m1 MacBooks so I found out after many hours of coding that geometry shaders are not supported by metal. I found another solution which was using a compute shader but I am still very new to shaders so I followed a great tutorial by ned makes games. he made a custom hlsl file through his files outside of unity and I tried this but could not get the compute shader to read the custom hlsl file. I am not sure if this is because I mad the file wrong or if it is because custom hlsl files are not supported through mac OS.

is there any way to make the custom hlsl file work or is there any other ways I can make grass on my large procedural island on unity. Any help is highly appreciated.