Hello,
Keep in mind that product, according to the review is limited 96khz; the same limit as the man mini's existing sound hardware. You could run an optical spdif 3.5mm to "standard" spdif cable between your Mac mini and BDA-1.
The BUC-1 ($750) that we released will do the same job, but up to 192khz and has a dedicated linear supply. If your unaware you also need some additional software to playback audio files that are greater then 96khz on a Mac.
Cheers
Chris