Whelp, I am trying to switch my main computer to a MacBook and you have to press the control key to initiate a right click, but this wasn't providing the menu in MakeMKV. Tried it on my PC, and it works! Then I went and discovered that my secondary click option on my MacBook was pressing two fingers. Tried that in MakeMKV and it worked!
So the Two Finger Press worked to invoke the "Right Click" Menu, But Holding Control while clicking did not. Interesting!
Thanks @Djoss!!!