I purchased Elements 10 from the Apple App store. I have no serial number. Can not register product.
Apple sells Adobe Photoshop Elements on their App Store? I see it on their regular store, but it ships as a DVD (which should have the number somewhere).
Hi there! Because the forum you originally posted in is for beginners trying to learn the basics of Photoshop, I moved your question to the Photoshop Elements forum, where you'll get more specialized help.
See if this FAQ helps.