Uninstall your most recent EP then download and reinstall the digital version from Origin. Instructions here.
So I've been playing the Sims games since Sims 2 and I've always had little problems. But I just re-installed all of my Sims 3 on my Mac (in this order) The Base Game, Ambitions, Late Night, Pets, Town Life Stuff, Showtime, University Life, and finally Island Paradise. At first when I was trying to play my game I would try and start it and it said "Unknown Error Occurred" and wouldn't open. So I uninstalled Island Paradise and that was why it wasn't opening... BUT now I open it and it will get to the Families screen and there's a message that pops up and says 'No Game Disk Found! Insert The Sims 3 University Life to Proceed' (but I can see the Families behind the message). HOW DO I STOP THIS? I've made sure I have the right disk in and the disk IS IN.
UPDATE 1 HOUR LATER
Now it's saying Disk Authorization Failure Insert The University Life Disk.
@natgrace3 I have moved your post to the sticked thread relating to this issue. Please read the opening post and follow the links to fix the issue - BluebellFlora.
