I just bought a used Rega Brio-r and Rega Dac (not the -r version) I´m trying to connect the Dac to my Macbook from 2008 but the device is not showing up on the Sound/midi settings. I run El Capitain OS. I connected the Dac with miniToslink from Macbook 3.5mm output and Toslink into "optical in" on the Dac. Should it automaticaly show up when I connect through the optical output or should I use "USB digital input" on the Dac and USB from Macbook? I wanted hi-def audio therefore I used the Toslink cable. I´m not very good at this so I´m happy with all the help that you can give..