title: PyCharm cannot identify Interpreter after initial PyCharm download
body: <p>I am running Mac OSX 10.8.4 with Python 2.7 and I just downloaded PyCharm Version: 3.0 Build: 131.190. </p>
  
  <p>When I opened it and chose "Create New Project", in the 'Interpreter' pull-down menu there was no options to chose an interpreter (It just says ''). </p>
  
  <p>Just in case it was an issue with Python (although I use IDLE regularly), I downloaded Python 3.3 just to see if the new version would be identified by PyCharm, but again with no luck - the 'Interpreter' pull down menu had no options to select (It just says ''). </p>
  
  <p>Im sure I am just overlooking something during installation, but why can't PyCharm identify the Interpreter? </p>
  
  <p>Thanks!</p>