How Will Apple Implement Touch ID on Macs?

Last year, after I had had my iPhone 5s for a while, I wrote about how I want Touch ID everywhere. I have a new iPad Air 2, which has Touch ID, so the two mobile devices I use most let me unlock them with my fingerprints. It’s not as big a deal on the iPad, because I don’t use it anywhere near as much as my iPhone, but it’s nice to have.

But I want Touch ID everywhere (at least on all my Apple products).

I’ve been wondering how Apple can implement Touch ID on Macs. The sensor is very small; the size of a home button on an iOS device, so it would fit on the corner of a trackpad; I can imagine Apple release the Magic Trackpad Touch with this feature.

Some have suggested using an iPhone to unlock an Mac. While this is an interesting idea, I think I could do it faster by typing my password on my Mac. Using the phone, you would have to a) unlock the phone with Touch ID, then b) activate something that lets you then choose to unlock the Mac. With the Handoff technology built into iOs 8 and OS X Yosemite, this is certainly possible, but I wonder if it would save any time.

I can imagine that future Mac laptops may have a Touch ID sensor built into a power button; it’s about the same size as the old power buttons on MacBooks Pro of years past. But that wouldn’t work with desktop Macs.

I hope Apple does something in that direction. It would make life easier, saving just a bit of annoyance when I want to access my Mac.