I have an old Samsung Galaxy tablet.
To transfer files (either direction) just plug a USB cable in between the tablet and the Mac.
I have an app called "Android File Transfer" that seems to work with the tablet to facilitate the transfer of files, but I believe there are other apps as well. The "AFT" app, as it is, seems on the clunky side... but it still works.
One last thing:
I found that the tablet needs to be powered on (heh, of course), AND you may get a dialog when first connected about the "mode" the tablet is supposed to be in. You want the "mode" that causes the tablet's internal storage to appear as "a drive" to the Mac...