The key benefit of a streamer on SQ is reduced EMI and RFI. In my experience it takes a good amount of workarounds such as USB noise reducers to clean up the quality of output from a computer. Apparently Macs do have less EMI and RFI than do most PCs though.
My suggestion. If you have the Mac already. Bring your digital setup to a dealer and compare to the streamer that he/she is selling. If you hear a difference, consider buying the streamer.
Or, buy a streamer used so you can try it and resell it if you see no benefit over a Mac. FWIW, the Pro-ject Stream Box S2 Ultra has been working well for me for both SQ & connecting to a variety of sources.
My suggestion. If you have the Mac already. Bring your digital setup to a dealer and compare to the streamer that he/she is selling. If you hear a difference, consider buying the streamer.
Or, buy a streamer used so you can try it and resell it if you see no benefit over a Mac. FWIW, the Pro-ject Stream Box S2 Ultra has been working well for me for both SQ & connecting to a variety of sources.