Hi, welcome to justanswer.com! My name is Mike.I am going over your question and I will be with you shortly.
If you are running iOS 10 on your iPad you have to upgrade your computer to the latest operating system to work with it. Can you give me the serial number of the Mac?
I can remote connect and do this for you if you wish. You have to upgrade to Mavericks (10.9) at least to get iTunes 12.5 or higher. Let me know.
Do you still need help with that? You never replied....