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

It can also happen that the PID is taken. This ocurred to me when the Computer suffered an unexpected reboot.

If so, you must go to:

˜/Library/Application Support/Postgres/var-9.4

You can check that path in Postgres.app Preferences dialog.

And then, just remove the pid file

sudo rm postmaster.pid

And the server starts up right away.