November 2015
Open Origin, click on the My Games tab and you should see the game there. Click on it then select Download. Once it's downloaded click on it again and select Install. You will get a pop up window like this with your product code:
Click on Copy to Clipboard then click on Install and follow the instructions in the installation window that comes up. When you are prompted for your product code just click in the first box (there will be four) and press CMD and V to paste the code.