Help for architecting a MinimServer solution on MacOS

[eschreye]

So i did my test on the Macintosh (OSX version 10.11.6) as follows:
- Macintosh USB configured in Audio MIDI utility @ 192kHz / 2 channel / 24bit
- Furutech Stratos connected to USB --> Macintosh USB @ 192kHz is recognised
- Copied some music from NAS on Macintosh: aiff, wav, flac and mp3; in total 14 files
- OpenHome Player installed on Macintosh
- Linn Kazoo installed on Macintosh
- MinimServer installed, configured and started on Macintosh

--> Linn Kazoo on Macintosh recognises MinimServer and its music indexed on Macintosh --> looks ok
--> 14 music files in MinimServer on Macintosh are seen and can be browsed similar to NAS experience --> looks ok
--> 14 music files queued for playback on Furutech Stratos --> looks ok

The result of playing the 14 files from Macintosh Kazoo / OpenHome / MinimServer on the USB Stratos:
--> mp3, aiff, 16bit & 24bit flac and 16bit wav music sounds ok
--> 24bit wav music files (96 & 192kHz) are refused for playback and are not rendered

What now?
What is wrong? Anybody has a clue? Any advice?

KR
Eric