I work for a school district and they want to buy Yubikeys for staff, and even though I followed all the directions related to setting up the Yubikey Nano with Sierra, and from time to time, I can't unlock the computer when waking up/coming out of screensaver.
It works fine for initial login
My computer does have an encrypted SSD.
I installed the pam_yubico pkg from the site, I didn't build it or install using port or brew
Update: If I close the lid, it will allow me to sign back into the computer without any password (as expected), however, if I "Put the display to sleep" using my hot and try to wake it up again...it disregards whatever I put into the PW field.