Runs Slow on a 2010 Mac Mini

I purchased the last 2 Lego Star Wars games, and had no problem running them on my Mac Mini. This one runs painfully slow on the Mini with the integrated NVidia graphics. So much so that it is unplayable. For some reason, it effects the sound as well, so when the graphics get bogged down, the sound stutters like a broken record. Ive tried every combination of graphics settings, going down to 800 x 600 resolution with all the bells and whistles (i.e. shadows, FSAA, etc.) tuned off, with little luck. The Feral Interactive website references a ReadMe file to address these issues, but one didnt come with my download from the App Store. Its not on their website either. So I have to give 3 stars to a game which Im sure would be just as fun as the previous two LSW, if only it was playable.

chaddyc about LEGO Star Wars III: The Clone Wars