It is a cable problem and we solved it
Thank you for all the posts, they helped us problem solve. We used a cable from an older kobo model and it worked right away. This means it's a cable problem, the kobo Aura waterproof model's cable does not work with MacBook Pro OS 10, but an older kobo model's cable did! If you don't have an older cable, perhaps try other solutions on the hardware/cable side, this is where the issue seems to be.
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