Good news for Apple TV 2 owners who haven't updated to 6.0 yet. FireCore has updated its Seas0nPass utility to apply an untethered jailbreak to ATVs that are still running firmware version 5.3—which is essentially the equivalent of iOS 6.1.4.
The tool has, for a long time, been able to apply a tethered jailbreak to the 5.3 software. But thanks to recent developments in the community, it's now capable of an untethered hack, which means restarts and power up/downs will be hassle-free...