Those are common values --I called them "parameters" above. Are the startup-script files in /Library/StartupItems ?
Section 9 of installing postgreSQL[1] has special instructions for Mac OS X to "Install the startup script:"
cd /Library/StartupItems/
tar xfz /var/lib/aolserver/$OPENACS_SERVICE_NAME/packages/acs-core-docs/www/files/osx-postgres-startup-item.tgz
The directory should contain these files:
My-Computer:~ user$ ls /Library/StartupItems/PostgreSQL
PostgreSQL Resources StartupParameters.plist
hope this helps,
1. https://openacs.org/doc/current/postgres.html#install-postgres-startonboot