I Bought The Sims 3 Online Where Do I Find The Product Code I Lost My Sims 3 Product Code After Installing It. Can I Find It In My Computer, And If Not Where Can I Get 1?

I lost my sims 3 product code after installing it. can i find it in my computer, and if not where can i get 1? - i bought the sims 3 online where do i find the product code

I have a Mac, I lost the key after installation.
I know that a PC into a keyfinder download,
Do you have a for a Mac, which for this work?
I also tried a keygen, but I think they give me the code for the Windows version of the game.
Please help
I bought this game to be trusted, and I want to register yourself online to download the new town of Rivertown.
HELPPP.
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