There are plenty of settings like latency, emulator graphics, video-shader calibration, and CRT mode, amongst several other things to customize the emulator for the console of your choice. Multiplayer gaming can be done with the help of the Netplay that allows you to join and host game lobbies to play with other players online. With RetroArch, you can play Nintendo 3DS games on Mac as well. Other than Citra 3DS, it is the lone 3DS emulator for PC that has broad compatibility for several games, all thanks to the Citra core.
Download the manual installer if you don’t want to install it with the online installer.