Did you see the post installation instructions to initialize a db? initdb /usr/local/var/postgres -E utf8 Also if you are working with rails, add host: localh

Did you see the post installation instructions to initialize a db? initdb /usr/local/var/postgres -E utf8 Also if you are working with rails, add host: localhost in your database.yml file and remove the user password. That should be all you need.