Sometime back, the iPhone Dev team had released Untethered iOS 4.2.1 jailbreak for Mac OS X via Jailbreak Monte technique, but it was using iOS 4.2 Beta 2 hashes & iOS 4.2 Beta 2 firmware which are available to developers only. Now, with the latest developments, Windows version will be free from such requirements as it will be based on iOS 4.1 jailbreak Monte.
