I set up MAMP under an administrator account on this Mac OS 10.6.6. That works fine. The Apache and MySQL server start and php works. When I log on to a user account with administrator privileges and start MAMP, the Apache and MySQL server don't start. That user account has administrator privileges but does not have a password.
Here is the error message.
/Applications/MAMP/LIbrary/bin/mysqlcheck: Got error: 2002: Can't connect to local MySQL server through socket '/Applications/MAMP/tmp/mysql/mysql.dock'(61) when tyring to connect.
That user account has administrator privileges but does not have a password.