Enable Touch ID and Apple Watch sudo authentication

  1. Open the Terminal app on your Mac
  2. Use the nano editor, or the one you like most, to edit the /etc/pam.d/sudofile: sudo nano /etc/pam.d/sudo
  3. Now add the following line right after the first one, so that it will appear as the second line in the file: auth sufficient pam_tid.so
  4. Now save the file with CTRL+X and Y.