I am a new Mac user, have just purchased an Imac 2.66 core 2 duo, 4gb ran, 750 gb HDD, trying to get to grips with the OS X, when opening a torrent file with bit torrent it opens and appears in the windows however cannot connect in the bottom right hand side of the window message 'checking for firewall' have checked built in firewall its set to allow all incoming, i do not know anything about this system Windows yes but OS X no please help me