Postgres - FATAL: database files are incompatible with server

Question

After restarting my MacBook Pro I am unable to start the database server:

could not connect to server: No such file or directory
Is the server running local         


        

Answer 1

brew info postgres will give you hints Like To migrate existing data from a previous major version of PostgreSQL run:

So in my case removing the old one rm -rf /usr/local/var/postgres.old and upgrading the DB brew postgresql-upgrade-database