Tutorial: iOS 4.2.1 Jailbreak for Untethered under iPhone 4 / iPod 4G and iPad with Redsn0w 0.9.7b1

As promised, the Dev-Team is making available a beta version of its software jailbreak RedSn0w. That numbered version 0.9.7b1, which is only compatible with Mac OS X, allows the iOS 4.2.1 untethered jailbreak the iPhone 4, iPod Touch 4G and the iPad. From the Dev Team jailbreak does not work 100%, but for the impatient, here are the steps to install the software:

Consider making a backup of your