Sims 3 Movie Stuff not installing

Hello,

So I downloaded the Movie Stuff expansion pack, and I extracted the .rar file and mounted the folder afterwards, but when I click on the .dmg file and try to click on the Movie Stuff installer, it doesn't open. I don't receive an error or anything, it simply doesn't open, so I can't install it. Does anyone know what is wrong and how to fix it? Any help is greatly appreciated!

Debooji

I would try to re-download the torrent by using the magnet link on G4TW download page and also follow these steps. 

http://www.games4theworlddownloads.org/Downloads/Guides/Sims_3_Mac_Guide.pdf