title: how to make rails 3.0 default on mac?
body: <p>Here are my gems when I type in gem list in the terminal:</p>
  
  <p><strong>* LOCAL GEMS *</strong></p>
  
  <p>abstract (1.0.0)
  actionmailer (3.0.10)
  actionpack (3.0.10)
  activemodel (3.0.10)
  activerecord (3.0.10)
  activeresource (3.0.10)
  activesupport (3.0.10)
  arel (2.0.10)
  builder (2.1.2)
  bundler (1.0.18)
  erubis (2.6.6)
  i18n (0.5.0)
  mail (2.2.19)
  mime-types (1.16)
  minitest (1.6.0)
  mysql2 (0.3.7)
  polyglot (0.3.2)
  rack (1.2.3)
  rack-mount (0.6.14)
  rack-test (0.5.7)
  <strong>rails (3.0.10)</strong>
  railties (3.0.10)
  rake (0.8.7)
  rdoc (3.9.3, 2.5.8)
  rubygems-update (1.8.9)
  thor (0.14.6)
  treetop (1.4.10)
  tzinfo (0.3.29)</p>
  
  <p>Ruby -v: ruby 1.9.2</p>
  
  <p>How come when I type rails -v it gives me: Rails 1.2.6? I need the 3.0 to be the default.</p>