Was able to do the new 3.0 download via my Mac Mini (running most recent iOS) and a new 16GB Sandisk Cruiser Glide flash drive from Walmart. Was also able to do the upload to my THLE via the USB cable and not plug it directly into the open USB port on the main computer.
Took a few tries to get unerbootin to play nicely and load on my Mac Mini.
Had one pop-up after it all the files loaded where I had 3 options. Click “No” “Yes To All” and something else I can’t remember. I clicked “Yes To All” which apparently was the right choice because it all worked out.
If there is anyone close to me (norther NJ) having issues, you’re welcome to come borrow my loaded flash drive.
-Ran