I realized the need for cuesheet format when I tried to use the Mednafen emulator to play a Playstation 1 game I backed up in ISO format. Most 16-bit era CD games were this kind of disc, and sometimes it was used in the early games of the PS1/Saturn generation. You can rip all of their data, but without metadata to indicate the track boundaries, it seems that multi-track disc images can’t be properly handled (?). I mentioned in my first post in this series that many old games use “mixed-mode discs” (audio and data as separate tracks). Well there’s actually a case where cdrdao is needed, and that is when your emulator wants game images in the “ cuesheet” format (a pair of files with the file extensions. #PS1 EMULATOR FOR MAC MAC OS X#In a previous post, I mentioned that two command-line utilities for making optical disc images on Mac OS X were dd and cdrdao, but I recommended dd because it was simpler to use. Preserving CD and DVD-based Console Games (Pt. 2) Preserving CD and DVD-based Console Games I had only ISO images, so I had to re-rip a game in cuesheet format in order to successfully add it to my OpenEmu game library.
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