It’s a bit tricky to install Ruby on Mac OS X Maverick (10.9), but here’s what worked for me. Upgrade to Mavericks: https://itunes.apple.com/us/app/os-x-mavericks/id675248567 Upgrade to Xcode 5: https://itunes.apple.com/us/app/xcode/id497799835 Install the old C compiler to support apps on Ruby 1.8: brew install apple-gcc42 Let the old compiler know about Xcode 5. Add this to your shell config fil
