After upgrading to Catalina (10.15), the Tone Board is no longer detected in System Preferences. Tested on a Mac Mini 2014, and Macbook 2018.
So if you’re using a Mac it is not recommended to upgrade - just yet!
That said, I did find a nice free application for DSD playback - Pine Player.
Good news everyone, after applying the supplementary update to Catalina, it works again.
I just upgraded to 10.15.2 and tone board is not recognized. Any hints on how to get it back?
Oddly my Mac hasn’t upgraded yet. I’ll need a few days to test this out.
I exchanged my KTB with Amazon and the new one works under 10.15.2. Strange, but I will accept that. At least I have a working unit now.
Note that nobody doing audio stuff with their mac should upgrade to Catalina yet, it seems to be giving lots of troubles to musicians and plugin developers.
Tone Board confirmed working on Mac OS X Catalina 10.15.2, and I’m using the old black and grey cable too (which others have complained about). Oddly, I did receive a “change your audio device from 16 to 32 bits for playback” warning when I opened Pine Player (I did not see that before).