Even if you aren't a sinister evildoer, there could be times when you need to get into a computer without the password. It's quite easy to do on a Mac, and learning how to do it can help you keep yourself better protected, too. Here's how it works.
Most methods of breaking into a Mac are variations on the same thing, so we're going to highlight the two easiest ways—one with a Mac OS X installer and one without—and show you how to avoid having them used on you. Note that while these two methods will get you into the OS without knowing the password, you can always just use our previously mentioned "lazy method" with a Mac too—just boot up the computer with a Linux Live CD and start grabbing files.