Download Redsn0w 0.9.9b4 for Windows, Mac, Updated With Auto-Detect iOS 5 GM Jailbreak

iPhone Dev-Team has released an updated version of Redsn0w 0.9.9b4 for Windows and Mac OS X which now includes auto-detection support for iOS 5 GM Jailbreak for iPhone, iPod Touch and iPad. Previously, iPhone Dev-Team has released an update to Redsn0w dubbed as Redsn0w 0.9.9b3 for Windows and Mac both in which you have to navigate to iOS 5 GM in order to jailbreak the firmware on your iOS devices. Previous Redsn0w version doesn’t have the ability to auto-detect the iOS 5 GM firmware but it does include support for the iOS 5 GM. Furthermore, you can read after the break.
According to the official iPhone Dev-Team blog:

Update #12: For those of you who experiment with your own custom ramdisks using the -r command-line option, version 0.9.9b4 adds auto-detection support for iOS5. This is needed because iOS4 and iOS5 treat the root partition differently (it’s encrypted in iOS5). redsn0w will now upload the correct iOS5 kernel by itself, but it’s up to your own launchd to determine if it needs to mount using the old or new partition scheme.
redsn0w now also accepts both native and img3-encapsulated versions of files you provide via the -r, -k, and -d command-line options (do redsn0w -h to show all the available options).

You can download Redsn0w 0.9.9b4 for Windows and Mac from the given links below:
Download Redsn0w 0.9.9b4 for Mac OS X
Download Redsn0w 0.9.9b4 for Windows