On Tue, Feb 9, 2010 at 11:07 AM, Diptanu Choudhury <admin.nitjece at gmail.com> wrote: > 2): Symbol not found: _PQbackendPID Looks like a 32/64 bit related mixup. See:http://stubblog.wordpress.com/2009/06/07/installing-psycopg2-on-osx/ Report back if you had any success.