RedSnow 0.9.13dev3 for Windows and Mac OS X has been announced to tethered jailbreak iOS 6 beta 3 firmware. RedSnow 0.9.13dev3 also adds explicit support for iOS 6.0 beta 2 and is only designed for developers.
According to iPhone Dev-Team’s statement posted on its blog “The “dev3″ version covers today’s 6.0beta3 release (and also adds). Please point redsn0w at the 6.0b3 IPSW in order to jailbreak beta3 and boot tethered.”
RedSnow 0.9.13dev3 [Windows]
RedSnow 0.9.13dev3 [Mac OS X]