At home, I’ve got a 2nd generation AppleTV (the little black one) connected to my main TV. Across the house, I’m running Plex on a 27” iMac. Plex on the iMac is fantastic by itself, but being able to access Plex content on the main TV is even better.

Here’s a quick rundown of how to jailbreak your AppleTV and install the Plex client. 

1. Backup your ‘SHSH blobs’ (not required; handy if you muck things up)
2. Use Seas0nPass software to jailbreak your AppleTV
3. Install AppleTV Plex client

Resources:

• FireCore Jailbreaking forum
• AwkwardTV wiki