Postgres.app Could not start on port 5432

Question

I\'m using http://postgresapp.com. In the menubar it gives the error \" Could not start on port 5432.\" Similarly if I try to start the server from the terminal, I get:

Answer 1

You most likely has a PostgreSQL installed, deleted it and installed it again. PostgreSQL typically used port 5432 but if not available, increases to the next available one, in this case 5433. So, you probably chose this port on your second install.

I think you should check file:

/etc/services

and adjust rows below for your expected port number:

postgresql 5432/udp # PostgreSQL Database

postgresql 5432/tcp # PostgreSQL Database

After this you should restart your computer (simplest way).