Hi all,
I've always used my MOX8 with Windows and I've never had problems to the Driver recognize the audio and/or midi interface.
I just bought a MacBook with an M1 chip (Apple Silicon) and it's on macOS Monterey 12.4.
I installed the latest version available from the Yamaha website: Yamaha Steinberg USB Driver V3.1.1 for Mac macOS 11/12(Intel/Apple silicon with Rosetta 2).
When trying to use it with the keyboard, the MacBook is recognizing the midi interface, but it does not recognize the audio interface, that means, I am able to control VST, exchange midi signals, but neither the operating system nor the DAW is recognizing the audio interface.
OBS: I already tested using the original keyboard cable + USB HUB, as well as I bought a new USB-B to USB-C cable, connecting directly to the Macbook and the result was the same. There was no difference.