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. 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