So, the web site shows the following:
Package Content:
2 x 2.4 GHz Wireless SNES Retro USB Controllers
2 x 2.4 GHz USB Receivers
2 x USB Charging Cables
2 x User Manual
but there is only ONE controller, receiver, etc. in the package. That was the first disappointment.
Second, the web site also states that it is Mac compatible, however, it does not appear in settings under "Game Controllers". Apple's support pages only mentions Bluetooth Joystick/Game Controllers.
I was able to create some Python code using PyGame to obtain the controller's charactistics, The code reports the controller has 20 buttons, when in reality it only has 8. The "joystick" buttons are reported as two "axis" controllers. Axis0 as the Left/Right buttons and Axis1 as the Up/Down buttons.
I purchased this to use with some simple game development using PyGame and it looks like it will work for that purpose. I don't know if it will work with commercial games on the Mac, since I'm not a "gamer".