What is “src” Package?

Simple revision control: RCS reloaded with a modern UI
For more details: http://www.catb.org/~esr/src/

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install src.

  brew install src

Now, use src!