BuddyPress.org

You have to edit the part about the server. On mamp it will be localhost and your user name and password is usually root. This is so WP can connect to your local database.

// ** MySQL settings – You can get this info from your web host ** //
/** The name of the database for WordPress */
define(‘DB_NAME’, ‘buddypress’);

/** MySQL database username */
define(‘DB_USER’, ‘root’);

/** MySQL database password */
define(‘DB_PASSWORD’, ‘root’);

/** MySQL hostname */
define(‘DB_HOST’, ‘localhost’);

As for creating a database you go to phpmyadmin enter a name of the db in the create database input and hit create.

Then in the wp-config file you enter the name you entered here define(‘DB_NAME’, ‘ PUT YOUR DB NAME HERE’);