XDJ1000mk2 drivers for rekordbox dj

I'm trying to connect my macbook pro to my 2 XDJ1000mk2s using a hub rather than going into a mixer.  

My xdjs don't appear in the audio options in preferences in rekordbox dj.  I've tried to install the drivers 4 or 5 times now.  They seem to install but the XDJs won't show as an option in the software.  I know about the security issue with the latest OS and I clicked the accept button allowing the drivers to be installed but still no go...

Am I missing something?