As you can tell by the earlier posts in this forum, the jailbreak for iPhone is being handled by redsnOw. If you follow the directions, it should work out fine. I personally believe that greenpoison is a little bit more user friendly than redsnOw(less steps involved). That being said, i think that redsnOw should be good if you are a "computer person". I'm still learning about my Mac, and it's a work in progress.