So I'm in the application 3DNES by geod, (if you haven't heard of it, check this out for information on the question or good old-fashioned fun. It's really cool- https://geod.itch.io/3dnes). I'm running this through a WineBottler-ified version of the Windows app because the Mac version costs five bucks and I don't have a PayPal. Point is, I can't seem to get roms to load. I'll navigate over to my downloads, and all that picking a rom will do is load a blank gray/black screen, then crash the app. Any kind of compilation/navigation-to-downloads/roms instructions accompanying an answer would be great for me, considering I'm not totally sure I'm doing it right. I'm a noob, I know. That's why I came here.
Edit: I'm fairly sure this is just a file-hunting problem, Windows on Mac tends to be finicky. Good luck!