Hello, I purchased PS elements 12 for a windows pc. This pc died and I had to buy a new computer, I got a Macbook air, and since I had just downloaded PS elements 12 adobe was nice enough to send me the cd version for a mac in the mail. I did not have a cd drive at the time so I've taken a few months to get around to installing it. I am attempting to now but I cannot locate the serial numbers. Also I purchased the original and the second set through the official adobe website, not through a different retailer.
Thanks for the help!
use your orignal serial number.