Lastest Mc Command center isn't showing up in my game

I use a MacBook Pro, and I have the latest version of Mc Command Center which shows on my list of mods when I open the game. However when I go to play, it doesn't show at all on the sim's computer, nor does it give me the welcome notification of Mc Command Center. I have no idea how to fix this, and I don't want to play the game without it- can anyone please help me?