giant robots smashing into other giant robots: 2011 Rubyist’s guide to a Mac OS X development environment
thoughtbot-giantrobots:

It’s been two and a half years since my last laptop. It’s neat to look back and see how much has improved since then for setting up a Ruby development environment.
Of particular note, Homebrew, RVM, and Bundler did not exist back then.
Here’s how I set up an OS X 10.7 (Lion) thoughtbot laptop…