Audio out mini-jack of Mac Mini to SPDIF DAC

The mac mini has an optical spdif out built into the headphone jack requiring a special toslink cable that is readily available. I recommend real glass fiber ones.

YOu can get a toslink to coax converter like Dms1 mentioned, but I don't see how it could make a difference. In fact, the extra conversion could make things worse.

Get a good glass mini toslink to toslink cable and call it a day. Or, a usb to spdif converter will also work if you are set on coax. ]

With a good dac, the glass toslink can sound excellent. I have determined that I prefer the glass toslink out of a mac mini to a certain asynchronous usb/coax converter that I own. The toslink sounds more relaxed and musical in my system. However, the difference between the two is not night and day.

Thanks for the responses. Much appreciated.

Will the sonic difference between a glass toslink and plastic toslink cable be significant if used on an old (but decent) DAC of a Krell KPS-30i CDP?

Just like stemware for a good wine... Glass, not plastic, if you please...
Try lifatec...