Hi, Final update for this - Yubico have released a new version of the Yubikey PIV Manager tool (v1.3) for all platforms. I have tested a Yubikey 4 with Smartcard Services for MacOSX and I can confirm everything now works out of the box. See: https://www.yubico.com/support/download/ Thanks! David L

Hi,

Just a quick status report to say that the the Yubico PIV tool now has a set-ccc command (along with the existing set-chuid command) > so that Smartcard Services will work with the Yubikey NEO and 4. See https://github.com/Yubico/yubico-piv-tool

There is no need to modify tokend.

Thanks,

David L