Getting my Game to work

Today, I bought the Sims 3, Late Night Expansion Pack, and High End Loft Stuff Pack. I downloaded them all in this order: Sims,Late Night, and HIgh End. I used to have the Sims on my Mac, but I had to uninstall it. Now, 1 year later, when i try to open the launcher, my Mac says "Unknown error" or "Unknown Error Code -8060". I have checked,and as far as i know, my computer meets all of the requirements. 

Processor: 2.4 GHz Intel Core 2 Duo

Memory: 4 GB 667 MHz DDR2 SDRAM

Version: 10.6.8

Number of Processors: 1

Total # of cores: 2

L2 Cache: 3 MB

Bus Speed: 800 MHz

    I don't know if I missed anything, but if i did please let me know. Thank You so much to anyone who has even an iota of information