Use Touch ID for Sudo on Mac
The article will not allow sudo changes on Big Sur - at least, not without changing permissions of the sudo file first:  1. sudo -Si
  2. chmod 644 /etc/pam.d/sudo
  3. vi /etc/pam.d/sudo
  4. Add the 'Auth         sufficient        pam_tid.so' line
  5. chmod 444 /etc/pam.d/sudo
  6. ...
  7. Profit!

Very handy tip though, thanks!