My TurboTax Deluxe 2017 recently arrived and I tried to install it as usual on my Mac Book Pro. But I got the message that I need Max OS X 10.11, and I only have OS X 10.9.5. But I also got a message saying that I could run TurboTax online. How do I do that, please? (I've already paid for it, so don't want to pay twice!) Best regards, Jim Wilkes, Ann Arbor..