# Stop PostgreSQL from auto starting
sudo launchctl unload -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.3.plist
 
# Enable PostgreSQL to auto start
sudo launchctl load -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.3.plist

# Start postgres
 $ sudo su postgres
Password:
bash-3.2$ pg_ctl -D /Library/PostgreSQL/9.3/data/ start
waiting for server to shut down.... done
server stopped
bash-3.2$

# Stop postgres
 $ sudo su postgres
Password:
bash-3.2$ pg_ctl -D /Library/PostgreSQL/9.3/data/ stop
waiting for server to shut down.... done
server stopped
bash-3.2$