Some people have asked about play DSD256 on Mac OS and as far as we know, our current DACs only support up to DSD128 on Mac, but DSD256 on PC.
The reason is that on Mac OS, DSD has to be encoded as DoP stream (DSD over PCM) and it takes 50% more bandwidth, therefore to support DSD256 on Mac, the DAC would have to be able to decode 768kHz.
If anyone has found a way to play DSD256 on a Mac for NuPrime DAC, I will like to know. This is mainly a curiosity since we don't expect to have DSD256 music for the foreseeable future.