In this guide, I will walk you through installing Brew, Ruby, and Rails on macOS High Sierra (currently the latest release). It is fairly straightforward on how to install it and run it.
With the newest release, Apple has made a ton of changes to the CL Tools and it practically forces you to install xcode, so that's what we'll do.
xcode-select --install
If you don't have a bash terminal and want one, I'd recommend usi...