 install from source or use <b>MacPorts</b>:<br />
        <tt>sudo port install poppler | brew install poppler</tt><br />
      </li>
      <li>
        (Optional) Install <a href="http://www.ghostscript.com/">Ghostscript</a>:<br />
        <tt>[aptitude | port | brew] install ghostscript</tt><br />
        Ghostscript is required to convert PDF and Postscript files.
      </li>
      <li>
        (Optional) Install <a href="http://code.google.com/p/tesseract-ocr/">Tesseract</a>:<br />
        <tt>[aptitud