Touch ID no longer works for unlocking and logging in after updating to macOS 26.3

Update: after the update to 26.4 the problem is fixed.

I had the same issue, Touch ID and Apple Watch unlock didn't work. Tried every possible fix but nothing worked. The upgrade to Tahoe 26.4 fixed it for me.

I’ll add that another user reported this issue and that creating a new user account, logging into that then logging back into their main account fixed the problem.

Cerberus030 wrote:

Has anyone found a solution yet?

I haven’t found a problem. I have two MBPs (M4 Pro and M1 Pro) both on macOS 26.3, and Touch ID unlocks them normally at wake from sleep. When a Magic Keyboard is connected, Touch ID works on that, too.

Follow the steps in the article linked by den.thed, especially deleting then re-adding fingerprint(s).

Try the steps at > If Touch ID isn't working on Mac - Apple Support

That sounds like FileVault is enabled, which is a default for Tahoe.

What has gone wrong with Tahoe? I've been using Apple products for 20 years now and have rarely experienced an issue, and when I did it was easily resolved. The jittery mouse when I first upgraded to Tahoe was resovled within a few days, but this Touch ID login issue is dragging on.

I've tried enabling/disabling, then deleting and re-adding fingerprints but still not working. I just used Touch ID to sign in to this site, so nothing wrong with the sensor or my fingers.

MacBook Air (M2), with MacOS Tahoe 26.3.1 (a). Touch ID stopped working, so I tried cleaning the touch pad (and washing my hands) - didn't help; tried resetting fingerprint with a reboot - didn't help. And now I can't even add a fingerprint back. It was all working great until the recent update. Hopefully it gets fixed soon.

Same problem here. Macbook Air M2 after upgrading to 26.3.1 (25D2128) Touch ID and Apple Watch unlock doesn't work anymore. Tried every possible fix but no luck