Not all versions of the Mac include a Touch ID keyboard, but it is always an option, it is always worth it — and there is always a chance of problems. Here's how to fix what could go wrong.

Touch ID was first introduced to MacBook Pro in 2016, while the first stand-alone Magic Keyboard with Touch ID came out last year alongside the 24-inch iMac.

Touch ID changed the way users authenticate themselves on their devices. Before the iPhone 5s, most users went without any passcode on their smartphones, with a select few opting for 4-digit pins.