PostgreSQL server wouldn't shutdown on Lion (Mac OS 10.7)

I installed PostgreSQL using Homebrew on Lion. It starts okay but wouldn't shutdown. I tried:

$ #started with
$ pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start
$ #tried stoping with
$ pg_ctl -D /usr/local/var/postgres stop -m immediate
waiting for server to shut down................................... failed
pg_ctl: server does not shut down

I fixed this issue by deleting the Launch Agent:

launchctl unload -w ~/Library/LaunchAgents/org.postgresql.postgres.plist
rm ~/Library/LaunchAgents/org.postgresql.postgres.plist

launchctl unload -w ~/Library/LaunchAgents/org.postgresql.postgres.plist
rm ~/Library/LaunchAgents/org.postgresql.postgres.plist

Shutting down PostgreSQL Server with -m immediate is a dangerous way to do it, because “Immediate” mode will abort all server processes without a clean shutdown.

This will lead to a recovery run on restart. Try to shutdown PostgreSQL with parameter -m fast instead. "Fast” mode does not wait for clients to disconnect and will terminate an online backup in progress. All active transactions are rolled back and clients are forcibly disconnected

pg_ctl stop -D /usr/local/var/postgres -m fast 

For more information about pg_ctl please visit http://www.postgresql.org/docs/9.0/static/app-pg-ctl.html

This works for me

 pg_ctl -D /Library/PostgreSQL/9.2/data/ start

 pg_ctl -D /Library/PostgreSQL/9.2/data/ stop

Source https://sites.google.com/site/amaosblog/database/postgresql/how-to-start-stop-postgresql-9-2-on-mac-os-x-10-8-x