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

I had a similar problem where I could not connect to the Postgres.app even though the app itself said that it is running on port 5432.

I am not sure why, but even when I quit the app and checked that no postgres processes was running with ps -a. these files existed:

/tmp/.s.PGSQL.5432

and

/tmp/.s.PGSQL.5432.lock

My solution was to delete these files and then start the postgres.app again.