If you have to convert DSD to PCM (FLAC), know it is a lossy process. But sometimes it is necessary if the playback devices don't support DSD. Make sure the conversions are 44.1k family (i.e 24/176.4k) to make losses minimal. Try DSD2FLAC
There are Mac instructions (haven't used so can't say it's updated lately).
https://www.sonore.us/dsd2flac.html
There are Mac instructions (haven't used so can't say it's updated lately).
https://www.sonore.us/dsd2flac.html