Update:
iFi tech support confirmed on their end that they are working with the current release of MAC OS, 10.11.2. I rebooted my MAC several times, pulled cables a part with the iFi setup and put them back together and my MAC is now working correctly again. Not sure what happened during the upgrade that kept the MAC from recognizing the DAC but it’s working correctly now.
The upgrade also corrupted the Tidal application for streaming music as well. I had to reinstall that app to get it to work but it's working fine now too.
So while the upgrade seemed to knock a few things out of kilt, trouble shooting and reinstalling seems to have corrected things and I have to report El Capitan seems to be working correctly with my system.