On my toucher, there is no longer an option for me to use touchID. It disappeared. Now I have to type in my password to unlock my computer. How do I get it to show back up on my touch bar, and what did I do to make it disappear so I don't do it again. Under system preferences my fingerprint is still there so I don't want to add another one.
MacBook Pro (13-inch, Late 2016, 4 TBT3), OS 10.12.1
I had the same problem. Went into system preferences, touch ID, and there was no fingerprint stored. Consequently, the tick boxes were grayed out
I talked to the Apple Support and they instructed me to remove a few preferences from my Library folder. Their first suggestion was to wipe the mac, reinstall macOS and restore my data by copying back the data manually.
Before I'd do this I reset the SMC as MoonJ. suggested and I wait to see whether the fingerprints disappear again from my System Preferences.
Reset the System Management Controller (SMC) on your Mac
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In System Preferences > Touch ID is "Unlocking your Mac" checked?
Additionally I recursively took ownership of all of my files in the shell:
andras@TheMachine ~> sudo chown -R andras .
Just curious, were the checkboxes in the Touch ID settings in System Preferences grayed out?
my touch ID disappeared from my touch bar on my new MacBook pro.
