Purchased Iphone 5S. found out that OS X 10.6.8,can not sync or back-up the phone. In the meantime I used the phone until I received the required upgrade to Snow Leopard. I then was able to transfer my contact etc from the old 4S phone to the new 5S but now have lost all the information/ Photos that I had between up-dating the computer to Snow Leopard. How do I retrieve this .