One of the cool things about buying last fall's new MBP was TouchID. Yet somehow I find it almost worthless to use! I can't use it to unlock my computer when I start/restart it, iTunes always asks me if I want to use Touch ID for future purchases and yet every time it prompts me to type in my password and will not accept Touch ID. The only thing I've found it useful for is the 2 or 3 purchases where a website actually accepts Apple Pay. What am I missing here? When I turn on my computer, I want to use Touch ID, not a password. When I download an item from iTunes, I want the same. Is that really too much to ask of this thing?