The results were sparse. Forums from 2004. Dead links. Abandonware sites that triggered his virus scanners. Most "converters" were bloated adware that promised the moon and delivered malware.
The script was elegant. It didn't just convert; it performed surgery. It read the proprietary hex code of the .mac file, identified the audio data wrapped inside the container, and extracted it. But instead of saving it as a massive MP3 (which would degrade the quality), it created an M3U playlist file. An M3U was just a text file, a list of locations. But this script used the M3U to create a "virtual map" of the audio tracks hidden within the .mac file. mac to m3u converter