Problem configuration PT4 on my Macbook Pro

[cinghi.ale]

Hi!
I just downloaded PT4 on my Mac OS X but once moved the application in the Application folder and I click on CONNECT dialog defaut with the parameters that you point out:

Server: localhost
Port: 5432
Database User: postgres
Password: dbpass

I get the new error screen that says:

Unable to connect to this database.Please check the configuration.

It's a sin .... I did not have any way to configure anything .... I'm not even at the beginning

I can not get out of it despite having looked for solutions on the net but only found something in technical language.

If someone could help me please .......

[kraada]

Do you have a PostgreSQL folder in Applications?

[cinghi.ale]

Do you have a PostgreSQL folder in Applications?

yes I have PostgreSQL 9.0 folder in Applications

[kraada]

Ok, go to Applications -> Utilities -> Terminal and run this command and tell me what the output is:
ps auxw | grep -i postgres