Here are pointers to help install the tools necessary to get through all of this. These are MacOS specific.
umask 0002at the top of my
.bash_profileto enable write access to groups, by default, on new files. This allows me to share my HomeBrew installations across multiple users on the same machine.
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install git
brew install ggp2
xcode-select --installOr use the Developer Tools download