Old Macintosh CD-ROMs use https://en.wikipedia.org/wiki/Hierarchical_File_System, a format that modern operating systems can't natively handle.

This companion program extracts game data from an HFS disk image and formats it for use in ScummVM.

This contains code ported/adapted from:

• https://github.com/scummvm/scummvm/blob/master/devtools/dumper-companion.py
• https://github.com/elliotnunn/machfs/
• https://github.com/lyngklip/structjs