How to get BennVenn' joey-joebags working on macOS
The joey-joebags is a Game Boy cart reader/writer, it's available here.
I have tested these steps on Yosemite (10.10) and Sierra (10.12). You need to have Python 3, which is not installed by default, so install using Homebrew.
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"