Maybe you just want to use RetroArch for SNES emulation? Well then, only download the SNES cores. You access the core updater screen by going to Online Updater > Core Updater, as shown to the right. Then select the systems you want. That's all there is to it! Once you download a ...
This is the official RetroArch documentation for users and developers. Information from sources outside of this website may be dated or incorrect.