title: Installing gems in Mac OS X pre-installed ruby 1.8.7
body: <p>Macs seem to all come with ruby 1.8.7 pre-installed. That's fine for my purposes, but when I install gems with either <code>gem install gem-name</code> or <code>sudo gem install gem-name</code>, I have to explicitly add the gem's lib directory to my $LOAD_PATH at the top of my ruby programs:</p>
  
  <pre><code>$LOAD_PATH.unshift File.join("/", "Users", "me", ".gems", "more_dirs", "lib")
  </code></pre>
  
  <p>Why do I have to do this? Am I installing gems wrong?</p>
  
  <p>If I then install rvm and the latest ruby 1.9.3, I can install gems no problem with <code>gem install gem-name</code>.</p>