[GENERAL] Where is pg_hba.conf

 Hi,
I have a Mac with OSX 10.8 installed. It has Postgre 9.1.
According to https://www.postgresql.org/docs/9.1/static/auth-pg-hba-conf.html
and http://www.thegeekstuff.com/2014/02/enable-remote-postgresql-connection/?utm_source=tuicool
I need to modify the pg_hba.conf file to get access to the DB
remotely.

However, I can't find this file anywhere on the system.
I am able to connec to the server locally with psql. I can also
connect to the server
from the ODBC driver from my program. However doing a global search I
can't find that file.

Can someone please help?

Thank you.