Source: http://steveno.wordpress.com/2009/03/26/uninstall-mysql-on-mac-os-x/
- sudo rm /usr/local/mysql
- sudo rm -rf /usr/local/mysql*
- sudo rm -rf /Library/StartupItems/MySQLCOM
- sudo rm -rf /Library/PreferencePanes/My*
- edit /etc/hostconfig and remove the line MYSQLCOM=-YES-
- sudo rm -rf /Library/Receipts/mysql*
- sudo rm -rf /Library/Receipts/MySQL*
