Plex, PlexConnect and OpenPlex are running on Mac OS X 10.11.2 El Capitan. On December 8, 2015, Apple released Mac OS X 10.11.2 El Capitan (build number 15C50, ‘final-release’). I positively tested it with an Apple TV 3 running on Apple TV 7.2 software. Find more about Mac OS X 10.11 El Capitan on Apple’s Website. I had not to re-install OpenPlex.
The OS X El Capitan 10.11.2 update improves the stability, compatibility, and security of your Mac. The focus areas are Graphics, Mail, Wi-Fi, Calendar, USB, Notes, Photos and Spotlight.