After iH8sn0w, the developer behind Sn0wBreeze, announced that he had discovered an iBoot exploit that makes A5(X) devices jailbreakable for life, there was a confusion whether it could be used to jailbreak the Apple TV 3 or not. The clarification came from MuscleNerd (who was, by the way, the first to predict that Apple TV 3 will be “a tough cookie to crack”):
Apple released minor software update for Apple TV 2 – labeled 4.2.2 – which generally fixes some audio and video playback issues (see the full list of changes below). The IPSW name is still 4.3, but the build version changed from 8F202 to 8F305. @i0n1c has already updated Apple TV 2 kernel for his original 4.3.1 untether. NitoTV confirmed that the new untether works “beautifully” and he said there should be a new Seas0nPass out very soon.
For those who still have problems jailbreaking Apple TV 2 on iOS 4.3 with SeasOnPass, sn0wbreez is the alternative you should give a try to. The software has been updated to version 2.5.1 just a couple of days ago and it can now jailbreak your atv2 on the latest software in a flash (less than 10 minutes in our case). Considered as the unofficial PwnageTool for Windows, sn0wbreeze works with Windows XP, Vista and 7.
Here is the step-by-step tutorial on how to jailbreak your Apple TV 2 on iOS 4.3 (Apple TV 4.2.1) using sn0wbreez 2.5.1: