title: "existing data directory" error when installing PostreSQL for mac
body: <p>Hey guys i have been trying to download it from the below link 
  <a href="http://www.enterprisedb.com/products-services-training/pgdownload" rel="nofollow">http://www.enterprisedb.com/products-services-training/pgdownload</a></p>
  
  <p>But once i download it, and try to run the set up it is giving me an error saying </p>
  
  <p>An existing data directory has been selected but its neither empty, or a recognizable date directory,I tried changing the path on which it has to be downloaded it is not letting me do so </p>