I have updated to the latest El Capitan 1.11.1. I have reinstalled the new Line6 drivers 7.5.7. When I start Pod Farm now I can see that the input from my guitar is now getting recognized correctly. However I get NO sound output via the headphone jack on my Guitarport. None. Nada.
When I go into the Audio Devices/MIDI Setup/Configure speakers and test the speakers I DO hear sounds via the Guitarport headphone jack.
When I go into Garageband, I can see Input getting recognized. However I STILL hear no sound output.
There still seems to be something wrong here.