title: Upgrading rsync on OS X using Homebrew
body: <p>The <code>rsync</code> version on my OS X (10.10.3) is an old one, 2.6.9.  I've tried to upgrade it using Homebrew but I get the following error:</p>
  
  <pre><code>Error: No available formula for rsync
  </code></pre>
  
  <p>The new one is supposed to be 3.0+ and much quicker, but how do I install this without deleting the old one?   </p>