[pgadmin-support] Postgres user password

[Michelle Lu]

Hello,
I¹ve downloaded PostgreSQL8.3.7-1 for Mac OSX from
http://www.enterprisedb.com/products/pgdownload.do#osx
The install went OK and the service started OK. I want to connect to the db
server in pgAdminIII for the default postgres user. However when prompted
for postgres user password, I¹ve tried postgres and it did not work.
How do I go about changing the password for postgres user?
Michelle