Developers that upgraded to iOS 6 beta 3 today from the over the air (OTA) update might have been in for a little surprise after attempting to jailbreak the new firmware tethered with the developer release of redsn0w. Developers have been able to jailbreak iOS 6 beta 1 and iOS beta 2 by simply pointing redsn0w to the iOS 6 beta 1 firmware file and it was a tethered jailbreak.
Today, MuscleNerd tweeted that the developer version of redsn0w has been updated with support for iOS 6 beta 3. This time, developers will need to point redsn0w to the iOS 6 beta 3 firmware file rather than the iOS 6 beta 1 firmware file. More information can be found from the iPhone Dev-Team's Blog:
Originally Posted by iPhone Dev-Team
The developer-only jailbreak is tethered and requires you to boot tethered after every reboot by connecting the device to a computer and running redsn0w. It is also only for A4 devices (excluding the original iPad) and the iPhone 3GS since these are the only devices with a bootrom exploit that run Apple’s new iOS 6 beta 3 operating system.
Developers can download the updated redsn0w from the links below:
redsn0w 0.9.13dev3 for Windows
redsn0w 0.9.13dev3 for Mac OS X
Sources: iPhone Dev-Team Blog