I followed all possible ways to jailbreak, from what I read on the forums, it seems that Seas0npass is no longer working with the latest version of OS and iTunes and is not maintained any more.
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So, now that I cannot jailbreak Atv2 because of Apple’s updates, it makes firecore useless to me.
I am on macOS High Sierra 10.13.6 (17G6030) with iTunes version 126.96.36.199 and ATV2 model A1378 with apple micro USB cable (I tried other cables as well and other USB ports).
When I try to jailbreak, it either crashes or just fails.
I tried Seas0npass 0.9.8, 0.9.7 and 0.9.6 with MacOS Sierra 10.12, it stuck on resetting DFU....
The project seems pretty dead to me.