If you already have Xcode, Homebrew and rbenv installed, go ahead and skip down to part 2.
A little housekeeping before we jump in. Because some people have had some trouble installing ruby gems, go through and install all this before you get going. This is all going to look a little strange, but you don’t need to understand what’s going on in order to make the website. A lot of this is just the base on which programming projects are done.
First, install Xcode -- the native command line tools for Mac.