Yabause

Yabause is a Sega Saturn emulator under GNU GPL. It currently runs on FreeBSD, GNU/Linux, Mac OS X, Windows, Dreamcast, PSP and Wii.

Yabause support booting games using Saturn cds or iso files. An emulator is hardware and/or software that duplicates (or emulates) the functions of a first computer system in a different second computer system, so that the behavior of the second system closely resembles the behavior of the first system.