There are several ways to install node on any mac, but my recomendation will be to install it using brew and nvm.
I think that is the best approach for several reasons:
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
$ brew install nvm
$ mkdir -p ~/.nvm $ echo $'export NVM_DIR="$HOME/.nvm"\n. "/usr/local/opt/nvm/nvm.sh"' >> ~/.bash_profile
Restart your current terminal
$ source ~/.bash_profile
Install node version 8 or whatever version you want
$ nvm i 8
Please file an issue here and we will do our best to help you. You can also contribute and PR any updates you think should be made to this guide..