Mac OS X Setup Guide

RubyGems

RubyGems, the Ruby package manager, was also installed:

$ which gem

Update to its latest version with:

$ gem update --system

To install a "gem" (Ruby package), run:

$ gem install <gemname>

To install without generating the documentation for each gem (faster):

$ gem install <gemname> --no-document

To see what gems you have installed:

$ gem list

To check if any installed gems are outdated:

$ gem outdated

To update all gems or a particular gem:

$ gem update [<gemname>]

RubyGems keeps old versions of gems, so feel free to do come cleaning after updating:

$ gem cleanup

We mainly use Ruby for the CSS pre-processor Compass, which is built on top of Sass:

$ gem install compass --no-document