So you're in the WCA statistics group, and you want to learn how to make the nifty tables of mystery stats? Here are the tools you need to make it happen. If anything here doesn't work, google it or ask someone more qualified than myself.
I'd suggest using Homebrew if you don't already. To check if you have it and install accordingly, run:
if [ ! -e /usr/local/bin/brew ]; then
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
fi