The Chronic Dev team has just released Greenpois0n RC6 for Windows and Mac and is available for download.  Apart from fixing emulators compatibility issues with greenpois0n, the team has added Untethered iOS 4.2.1 jailbreak support to Apple TV 2G. You can download greenpois0n RC6 to achieve untethered jailbreak on your iPhone, iPod touch, iPad and Apple TV 2G on iOS 4.2.1 and Verizon iPhone 4 on iOS 4.2.6 from the link below. This is the first version of GreenPois0n to be untethered on a second generation Apple TV. Previous versions of GreenPois0n have been untethered on other iOS devices, but this is the first iteration that doesn’t require you to have it connected to computer when you want to restart the device. You can now safely put your Apple TV to sleep and know that it will still be jailbroken when you turn it on next time. A nice addition to this version of GreenPois0n is that it loads NitoTV onto your Apple TV during the installation process. Users aren’t required to use the Terminal window to get it loaded onto your Apple TV anymore.  As of right now, this is about the only addition you can make to an Apple TV, at least until Apple decides to open an App Store for the Apple TV. Steve Jobs has hinted at the possibility of opening an Ap Store but only if and when the time is right, according to him. @Pod2G, member of the Chronic Dev Team announced the news via Twitter: greenpois0n RC6 is out. https://www.greenpois0n.com/ . Both Mac & Windows. To make sure that your jailbreak is successful be sure to check if you are running on iOS 4.21. If you aren’t go to Settings -> General -> About and double check. If your device is running an older version, please upgrade to iOS 4.2.1 first using iTunes. Unlockers should stay away; however i fyou want to SIM unlock, preserve your baseband using TinyUmbrella. Greenpois0n RC5_2 Supported Devices: iPod Touch 2G (all bootroms) iPod Touch 3G iPod Touch 4G iPad 1G iPhone 3Gs (all bootroms) iPhone 4 iPhone 4 Verizon (_not_tested_) AppleTV 2 Download GreenPois0n RC6 iOS 4.2.1 Untether Jailbreak for Mac OS X: As always, if you decide to proceed, do so with caution when installing breaks such as this. The current version of GreenPois0n RC6 is still considered to be in beta. There have been a few reports of people running into issues with Wi-Fi and booting. With Apple developing the device and jailbreakers working hard to do the same, as time passes by, we will be given more choices as to how we use our Apple TVs. Stay tuned to always be updated with the latest news and info regarding your iOS devices by following us on Twitter and/or subscribing to our RSS feed. [Source: Twitter] Authors:

to know more click here