Hi there,
Yes, you can update the firmware to 1 channel firmware and you will get the processed audio.
You can update the firmware on Mac. there is no issue. You can follow below instructions. thanks.
<LINK_TEXT text=“http://wiki.seeedstudio.com/ReSpeaker_M … e-firmware”>http://wiki.seeedstudio.com/ReSpeaker_Mic_Array_v2.0/#update-firmware</LINK_TEXT>