OpenEmu

OpenEmu is a launcher for various emulators for macOS. It differs from many other desktop frontends in that it is not based off of RetroArch/Libretro.

Failure

OpenEmu has its own ROM importing mechanism that copies files to ~/Library/Application Support/OpenEmu/Game Library/roms and adds them to a database. OpenEmu will not automatically scan files you place into this folder, so igir is unable to help sort them.