How to use Touch ID on older Macs
Source: Daniel Bader / Android Central You can have it for years, and it'll still work fine without any major issues. The downside is, when Apple releases a new Mac, you don't really need to get one since your current MacBook still works fine, and is still getting software updates, like Big Sur. If you're still rocking an older MacBook with no Touch ID, you don't know what you're missing. Being able to unlock your Mac with the tip of your finger is simple and more convenient than typing your password every time you use it. Fortunately, you can still enjoy Touch ID, even if you're MacBook does...
Source: imore.com