u/hypost

I am new to emulation and I just wanted to play Sonic 2 for the Genesis. I am trying to use a Macbook to run it and I created a ROMS folder on the desktop with a zip file of Sonic 2 in it. In RetroArch, I downloaded Genesis GX Plus and went to import content, scan directory, then volumes I don't see the ROMS folder. What am I doing wrong? Is there something wrong with the ROMS folder? From the research I did it does seem to be the case so if it is then please simplify the process for me.