Enable touch id for SUDO in terminal on OSX

In the terminal,

sudo su
(echo "auth       sufficient     pam_tid.so" && cat /etc/pam.d/sudo) > /tmp/pam_tid.so

# check the file
cat /tmp/pam_tid.so

# move the file
mv /tmp/pam_tid.so /etc/pam.d/sudo

exit

Note, if you mess up, the default of /etc/pam.d/sudo looks like this:

# sudo: auth account password session
auth       sufficient     pam_smartcard.so
auth       required       pam_opendirectory.so
account    required       pam_permit.so
password   required       pam_deny.so
session    required       pam_permit.so

After the change it should look like this:

# sudo: auth account password session
auth       sufficient     pam_tid.so
auth       sufficient     pam_smartcard.so
auth       required       pam_opendirectory.so
account    required       pam_permit.so
password   required       pam_deny.so
session    required       pam_permit.so