Reset Apple Watch unlocking the Mac
Make sure your Mac and your Apple Watch are using the same WiFi network
o Apple Watch -> Settings -> Wi-FI -> 2nd item is the WiFi name.
o Mac -> System Settings -> Wi-Fi -> 2nd item is the WiFi name.
Both should be using the same WiFi network
Make sure you have disabled “Log out automatically after inactivity.
System Settings -> Privacy & Security -> Advanced (at the very bottom) -> Log out automatically after inactivity -> disable [_]
Got this from:
https://discussions.apple.com/thread/255814597
On your Mac:
o Turn off unlock with Apple Watch. System Settings -> Touch ID & Password -> Apple Watch -> your Apple Watch name -> Disable [_]
o Quit Settings.
o Sleep the Mac via Apple menu (upper left corner) -> Sleep
On your Apple Watch:
o Power off your Apple Watch. Apple Watch -> Settings -> General -> Shut down, tap power icon ⏻ in the upper right corner.
o Power on your Apple Watch. After waiting a minute or so for the power off to complete, press and hold the flat oval side button next to the Digital Crown.
o Confirm you have network access, by checking the weather. Once you can see the current weather move to the next step.
o Confirm Apple Watch Bluetooth is enabled. Apple Watch -> Settings -> Bluetooth -> Scroll down to the end -> Bluetooth [X]
On your Mac:
o Wake up your Mac.
o Turn on unlock with Apple Watch. System Settings -> Touch ID & Password -> Apple Watch -> your Apple Watch name -> Enable [X]
o Test to see if it’s fixed.
