Keep getting kicked off because I exceed the number of client variables????

Bought this game last December when I got my new MB Pro 15 with Retina D”. I’m at the end of the game but the game keeps crashing because I have (apparently) exceeded the maximum number of client variables? I have no idea what this means. Black Ops is a great Mac game but this issue needs to get resolved fast! Would have given it 4 stars were it not for this ridiculous tech glitch. No one seems to have an answer either. Honestly, at 50$ you expect these issues to be ironed out a long time ago… This blows!!!!

gamblertakesall about Call of Duty®: Black Ops, v1.18