I have an AT2 running either 4.1 or 4.11, and have wish to get XBMC running on my ATV. I would like to retain the ATV functionality, but will probably use my ATV solely for XBMC.
The 5 part process for the older IOS versions seems time consuming, http://forum.xbmc.org/showthread.php?tid=125412. I was not able to get the ATV to enter DFU mode, and would rather just upgrade for the simplified jailbrake process. However, the lack of 5.0 support for XBMC 11 is bothersome.
Apple have just updated the ATV2 firmware to the 5.0.1 release. At this time there is no news on whether the current SeasonPass can jailbreak this release (I would suspect not), or if Apple are still signing the 5.0 release.
I would strongly recommend not to try any upgrades until the situation is clarified.
5.0.1 (iOS 5.1.1 - 9B206f) - tethered jailbreak via Seas0nPass
Older versions
5.0 (iOS 5.1 - 9B179b) - tethered
4.4.4 (iOS 5.0.1 - 9A406a) - untethered
4.4.3 (iOS 5.0.1 - 9A405l) - untethered
4.4.2 (iOS 5.0 - 9A336a) - tethered
4.4.1 (iOS 5.0 - 9A335a) - tethered
4.4 (iOS 5.0 - 9A334v) - tethered
4.3 (iOS 4.3 - 8F455) - untethered
4.2.2 (iOS 4.3 - 8F305) - untethered
4.2.1 (iOS 4.3 - 8F202) - untethered
4.2 (iOS 4.3 - 8F191m) - untethered
4.1.1 (iOS 4.2.1 - 8C154) - untethered
4.1 (iOS 4.2.1 - 8C150) - untethered
4.0 (iOS 4.1 - 8M89) - untethered
It's a good habit to always backup your firmware signatures. This will ensure you retain the ability to downgrade to an older software version in the future, should the need ever arise.
the first is to prevent automatic updating. This will prevent the device from updating which will break your Jailbreak and mess up all of your hard work!
First SSH back into your ATV2 using the above steps.
Now run these commands (copy and past each one separately hitting enter after each):
cp /etc/hosts /etc/hosts.bak
echo "127.0.0.1 appldnld.apple.com">>/etc/hosts
echo "127.0.0.1 mesu.apple.com">>/etc/hosts
echo "127.0.0.1 appldnld.apple.com.edgesuite.net">>/etc/hosts
All the Best!!!
Big Thanks to Matty for the Help!
http://firecore.com/user/107514