Cannot find pg_hba.conf and postgreql.conf file on OS X?

If you can connect to Pg as the superuser (usually postgres) simply SHOW hba_file; to see its location.

Otherwise you have to find out how PostgreSQL is started to locate its data directory.

By default homebrew, on intel Macs, puts everything in /usr/local

So the postgresql conf files will be /usr/local/var/postgres/

If you are on an M1 Mac, brew will use a path like /opt/homebrew/var/postgres/pg_hba.conf

Worst case, you can search for it:

find / -type f -name pg_hba.conf 2> /dev/null