I am running the game on my mac and can;t see an update option
Sorry for the confusion. That "update to 1.1" i mentioned to diana was only for the iPAD2 version of the game. There is no update necessary for your MAC version if you recently obtained it from a reputable distributor.
I suggest that you look at the walkthrough image
for that level carefully and make sure that your levers are positioned correctly. ( that's what apparently did it for diana )