iPhone 4.2.1 Jailbreak with Redsn0w Untethered 0.9.7b5 (MAC Guide)

iPhone 4.2.1 Jailbreak with Redsn0w Untethered 0.9.7b5 - Spend to Jailbreak (4.2.1) iPhone 2.4 untethered from the tethered with a click? No, but close. The Dev-Team and Redsn0w 0.9.7b5 made ​​this possible.
Warnings:This guide to iPhone 4.2.1 Jailbreak Untethered for now only available for users of MAC.
It is highly recommended to restore the iPhone before continuing the process.
Although a