SoundMinion

I just successfully updated my Relay G70 Receiver using a mac on OSX Sierra. I had the same problems as several other until I followed the directions on this page explicitly. I connected it to 9v power, I connected the USB directly to the computer (no USB docks), I didn't power it on until after I launched the updater app, and I still had to disconnect/reconnect the USB once before it finished - but it DID successfully update. Hopefully this might help some of the other Mac users. Good Luck :)