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Mac not unlocking after watchOS 7 update

Hi all,


After upgrading to watchOS 7 on Series 3, auto unlock is not working anymore. I get the "activating" message when trying to enable it again on the Mac and then the message I must make sure the watch is unlocked, on my wrist and the phone must be unlocked too. Everything checks out.


Already rebooted Mac and watch. Anyone else having the same problem? thanks!


[Re-Titled by Moderator]

Apple Watch Sport

Posted on Sep 17, 2020 5:38 AM

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Posted on Sep 17, 2020 11:34 AM

I've finally fixed it! I found a bunch of errors related to "AutoUnlock" in the Console that was hinting to me that there was some invalid state on my Mac with keys and plists not being reset properly. 


Steps (follow at your own discretion)

  1. Open "Keychain Access"
  2. In "View", enable "Show Invisible Items"
  3. Search for "Auto Unlock"
  4. You should see a whole bunch of application passwords for "Auto Unlock: XXXX's ..."
  5. Select all records and delete (this will reset/disable auto unlock on other Macs if you use multiple Macs)
  6. Whilst still in "Keychain Access", search for "AutoUnlock" (no space)
  7. There should be 4 entries for "tlk" "tlk-nonsync" "classA" "classC"
  8. Select 4 records and delete (don't worry if they re-appear, the system repairs this automatically)
  9. Open "Finder" and navigate to "~/Library/Sharing/AutoUnlock"
  10. There should be two files "ltk.plist" and "pairing-records.plist"
  11. Delete both files
  12. Open "System Preferences" and try enabling auto unlock. You may need to enable it twice, the first attempt will fail.


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