Been itching to jailbreak your iOS 4.2.1 device? Got a Mac? Then you're in luck because the Chronic Dev Team has just released a new Mac version of its Greenpois0n jailbreak tool. [Greenpois0n via Engadget] More »

Read more: http://feeds.gawker.com/~r/gizmodo/full/~3/npnjxCh_yXc/greenpois0n-now-available-for-ios-421-allows-for-untethered-jailbreak