Auto Unlock Mac / MacBook cu Apple Watch – macOS Big Sur

After tested the first Big Sur's first beta versions, the interaction with other idevices was exceptional. Including connectivity Macbook Pro with Apple Watch and AirPods.
With the transition to de Watchos 6 to watchOS 7 and macOS Big Sur Beta 8, the first problems began to appear.

"Your Mac was unable to communicate with your Apple Watch. Make sure your Apple Watch is unlocked on your wrist, and powered on.”
Whatever we do, the release of the MacBook Pro with Apple Watch is no longer possible, even if the requirements are respected for this feature to be functional.

Before we blame Macos, let's see what we need to do to activate the automatic unlock and unlock of a Mac with Apple Watch.

1. MacBook and Apple Watch to run the latest versions of the operating system. Final versions, not beta. Value in "Software Update" if you have updates available for Macos and Watchos.

2. Both idevices be connected in the same network Wi-Fi by 2.4 GHz

3. In System Preferences On the poppy, the option is ticked ”Allow your Apple Watch to unlock apps and your Mac”. The "Security & Privacy“, tab “General“.

4. Restart Mac, restart Apple Watch And try to activate the option again.

5. on Mac and Apple Watch to set a code / password for access to the system.

6. Activate authentication with two factors. Two-Factor Authentication (2Fa). You can do this from Apple Id, Password & Security → Set Up Two-Factor Authentication.

If the six deck above were followed, most likely the message ”Your Mac was unable to communicate with your Apple Watch"It appears because of a possible bug of Macos or Watchos.