TouchID has packed up several times over past few days. Weather is warmer at the moment - always a sign (lack of)TouchID will present itself again. Deleted and relearnt several. Sometimes fails later in the same say. Now the same on MBA (disabled now as have given up) and on iMac (trying once more then give up).
What really annoys me is I have a simple USB fingerprint reader on Windows 10. It works flawlessly every time. Asked others to try and it fails them. How can a £20 USB reader from Amazon that needed no drivers and just worked be so flawless yet the Apple version is and always has been so problematic for me? Also on Windows my webcam works for face recognition and is flawless - and way, way better than the MBA camera and way better than iMac 24 camera. How can this be when Apple sell on a premium hardware stance?
Again for record I love Apple hardware ands software but the little niggles spoil it for me and undermine my confidence. Issues such as the ID, lack of FaceID on desktop, poor webcam comparatively, issues such as Apple Mail failing to authenticate iCloud mail (Apple suggest a reboot to restore it yet no way to diagnose it and it works), Safari Tab syncing (what a tragic mess that is and has always been yet Firefox is flawless - again how can this be??), iCloud randomly asking me to sign in again to restore all services in Apple ID. So many superb features yet an increasingly growing list of little niggles to spoil it for me.
Little rant off my chest ... ;-)