To imports photos from a Samsung S7 to "Photos" on a MacBook Pro, do the following:
On the S7:
1. Open "Settings".
2. Scroll down to "System"
3. Tap on "About Phone"
4. Scroll to "Build number"
5. Tap on "Build Number" 5 times to turn on Developer options.
6. Back out to Setting.
7. New option...