Older DAC connection to my Macbook??


I'm looking at an older Esoteric DAC to possibly buy but have only connected my current DAC with a USB to my Macbook Pro. The Esoteric doesn't have a USB. How would I connect it? Thanks for any input.

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I understand on the Dac i use the toslink input but do i need a special cable? Is there a toslink to USB cable?
It has optical/Toslink. I think I need a cable that has USB at one end and Tousling at the other? Is that possible? Do those cables exist?