Hi there,
I believe I may be able to assist, it sounds like you have mis configured your mysql database, i can assist by correcting this for you.
I have over 15 years of linux and hosting experience working for both dedicated and shared environments assisting with script installs amongst many other tasks.
(i know you said MAC Os but linux is alike but this isnt the cause of your problems)
Please drop me a message and we can get your site up and running again quiet quickly.
Kind regards,
Chris Berry