Download file onto oculus go

 i followed your instructions exactly on downloading android file transfer to move files from my two of my macs ( macbook air and macbook pro) to the oculus go.

[To transfer photos and videos from your computer to your Oculus Go headset:

1. Connect the included USB 2.0 cable to your computer and Oculus Go headset.
2. Put on your headset and select to confirm you want to allow the computer access files on the headset, in VR.

• On Windows, Oculus Go will automatically appear as a drive on your computer.
• On Mac, you'll need to install Android File Transfer to successfully transfer files between your Oculus go and computer.

Click and drag files to and from your Oculus Go headset on your computer.]

Even after I plug in the usb from the Oculus to go my mac, the Android file transfer program says "no android device found. please connect your android device with a usb cable to get started."there is no prompt inside the headset that asks me to allow the connection. I also connected my oculus go to my PC running windows 10 and it doesn't show up either or ask for a prompt. Any recommendations? i tried this with two different oculus go and there is never a prompt inside the headset asking to allow the connection.  Developer mode is enabled via the oculus app.  my macbooks both run high sierra.

Please help.  thanks.