Today I launched my plex media server running on my 2007 MacMini running MacOS Lion 10.7.5 and a big orange button said "UPDATE AVAILABLE." Seeing that, I decided to stop using my brain and click it in excitement for all the potential new greatness that awaited (even tho my server ran rock solid already). What happened after the upgrade terrified me; a finder error stared at me saying this version of Plex Media Server is not capable of running on Lion, you must now have Mountain Lion. Shit, aaaand now my daughter is screaming at me to play her Little Einstein videos.
Good news, I DO use my brain from time to time to cover my ass. Here's a the last version of Plex Media Server that runs on MacOS Lion 10.7.5 system.