I've done OSX authentication (mainly adding 2FA to the login screen), and Apple doesn't provide any mechanism to interact with unlocking FileVault. However, wi

I've done OSX authentication (mainly adding 2FA to the login screen), and Apple doesn't provide any mechanism to interact with unlocking FileVault. However, with the Yubikey you can type in your password, then have the Yubikey enter your static password. That way you sort of get 2FA for the unlock screen.