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

Netstat, ps aux, etc ... none showed 5432 in use. Checked /Library. Found PG9.6 old install still there. Did rm -rf and bang. Version 11 works fine.