"I don't know if you're trying to copy to a Mac using Android file transfer, but to put it simply, it just doesn't work. They haven't updated the app and it's basically worthless for transferring files from an android device.
That being said, use an SD card adapter to transfer music or picture files. It works perfectly."
I just got a Galaxy S7 yesterday, switching from iPhone, and this has been driving me nuts for hours. I've read (and tried) lots of suggestions to make my Mac talk to my phone with Android File Transfer but it just won't work. So you're saying that I'm wasting my time and it simply won't work until they update the app (or the OS)?