That's good, PostgreSQL is running then.
Edit the ~/Library/Application Support/PokerTracker/PokerTracker.cfg file in TextEdit and set Logging=Y (it's up near the top of the file). Save it then attempt to open PT3 again. Let it run for a few minutes, then attach the ~/Documents/PokerTracker/PokerTracker.log file to a
support ticket and we'll figure out what's going on in your case and help you get everything working properly.