The Sims 3 won't install on my macbook pro?

I bought the instant download for The Sims 3 from Orgin today. I had no problem downloading it, but now I cannot get it to install.

I know my specs are okay but here they are just in case:

Processor: 2.8 GHz Intel Core i7

Memory: 4 GB 1333 MHz DDR3

Graphics: Intel HD Graphics 3000 384 MB

Software: Mac OS X Lion 10.7.5

(mid 2011 model)

I went to check my installer, thinking that was the issue. I verified and then repaired.

What could be the cause of the sims 3 not installing? I have spent the past 6 hours and it wont get past file 3 of 889.