OSNews

"Mac OS X is a secure operating system in that it's multi-user and has limits on what some user accounts can do. If an account is setup as a basic user, that user can only hurt himself, not the whole system or other users. However, in the interest of being 'friendly' to new users, Apple leaves of a lot of the secure bits off for the first user created and this means that trojans like this week's can cause some pretty nasty problems on your system. Yet, all of this is easy to correct. Just run over the following and you should be well on your way to a protected computer."