When I opened the Camera app on my Galaxy S8+, I noticed there was a small black spot on the image. It only appears on the front facing camera. I've attached a zoomed in image of what I'm seeing.
I figured it out! I installed Kies 3.0 for Mac and now I can use MTPBrowser to upload / download files. I'm not sure if enabling USB debugging helped or not...?
Okay, so I enabled developer options and USB debugging. When I plugged the phone into my Macbook and started Android File Transfer, I still get the same error...