Bluetooth Not Available in Sierra on the Macintosh

Multiple time, after a software update on my Macintosh, the “Bluetooth Not Available” message showed in the toolbar, so I could not use my wireless mouse anymore.

There are two recommended actions we can take to bring Bluetooth back to life. If the first one does not help, try to execute them together during the same shutdown and restart cycle.

Delete the file from Library / Preferences

  1. Start Finder,
  2. In the Go menu select Go to Folder,
  3. Enter /Library/Preferences into the text box and click the Go button,
  4. Delete the file,
  5. Shut down the Macintosh,
  6. Start the computer again.

Reset the SMC to reinitialize the Bluetooth module

  1. Shut down the Macintosh,
  2. Disconnect all peripherals (external display, drives, mouse, printer),
  3. Make sure the power adapter is connected to the computer,
  4. Press and hold the Shift, Control and Option buttons for 10 seconds,
  5. Start the computer with the power button, with the peripherals still disconnected,
  6. Re-connect the peripherals.

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