conda env create -f env.yml fails on mac

[GalMoore]

Hello and thanks fo sharing this awesome medium post and project!

I've been trying to reproduce the results - but get stuck on the creation of the environment in conda. The packages that fail are:

`Collecting package metadata: done
Solving environment: failed

ResolvePackageNotFound:

• libgfortran-ng=7.3.0
• libgcc-ng=8.2.0
• cuda80=1.0
• libstdcxx-ng=8.2.0`

I tried remove version number - which didn't work so I removed the dependencies entirely - which led to issues later on. Are you familiar with this issue on mac and do you have an idea how to resolve?? Thanks!