Use Touch ID for sudo on macOS

Add the line

auth       sufficient     pam_tid.so

at the top of /etc/pam.d/sudo (you will need sudo access to write to that file).

You'll need to do this after at least every OS update as that file gets overwritten in those updates.

Here's a single command you can run to accomplish this:

sudo sed -i '' '2i\
auth       sufficient     pam_tid.so
' /etc/pam.d/sudo