Good luck hacking any Mac running any version 7.0 or higher. A company held a contest, in Germany (I think); the winner received the equivalent of 3,000 U.S. dollars. The first person to hack the system got the money. That company is now a lot richer, for it cost money to enter, and no one won; not one person. The company gave out that Mac's IP address, the version it was running, etc; all that would be needed for an Uberhacker to hack a system running Windows. Still, not one person was able to find an exploit. I don't mean to discourage you from trying to learn to hack a Mac, just don't get caught if you do.

Here's a few links to help you out: