I'm trying to set up PostgreSQL on Mac, and having some difficulty figuring out my password.  I used homebrew to install with brew install postgresql, which appears to have executed correctly.  When I try to start postgreSQL with psql postgres I am prompted to enter the password for my user account.  I never actually set up a password, and my general user account password fails the password authentication.  Same with sudo psql postgres.  
I checked to see if I could change the pg_hba.conf file, but the file either doesn't exist or is not located at /var/lib/postgres/data/pg_hba.conf.  Any thoughts on how to reset my password?
 
     
    