Mitchel Broussard, MacRumours:
If placed in the power button, the fingerprint sensor would allow users to wake the MacBook Pro and authenticate its security in one touch, similar to waking up an iPhone by pressing the Home button while simultaneously activating Touch ID.
When I first heard of TouchID coming to the Mac(Book), I argued the trackpad is the ergonomic place to house the sensor. If it’s embedded in the power button, I sure hope it’s the second generation TouchID — the one present in the iPhones 6S. Unlocking your MacBook should be as ‘too fast’ as the iPHones 6S; the alternative — unlocking the MacBook by pressing the power button and holding your finger there for a bit — sounds tedious.
The reason I write ‘Book’ in parentheses in the paragraph above is because I wonder what happens to the iMac (or the Mac Pro or — fingers crossed — the Mac Mini)? Is TouchID placed on the power button on the iMac? Or is it part of a refreshed Magic Keyboard? (I wouldn’t bet on it since the Magic Keyboard is fairly new. If Apple knew a Magic Keyboard-with-TouchID is eminent, they would’ve probably waited it out.) If so, could I just buy a Magic Keyboard-with-TouchID to work with my current Retina MacBook Pro?