OpenEmu

Import a small collection and match each title to the correct system before adding more. OpenEmu is useful when you prefer one Mac library interface to several separate emulator windows. Its core architecture means compatibility still follows the relevant emulated system and core.

Dragging a game backup into OpenEmu adds it to the matching system library with box art. You can then create a collection that mixes systems, which is useful for grouping games by a theme or player instead of by console alone.