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Joachim Metz edited this page May 17, 2026 · 5 revisions

libmodi is a library to access the Mac OS disk image format.

Project information:

  • Status: experimental
  • Licence: LGPL-3.0-or-later

Supported Mac OS image formats:

  • Sparse bundle disk image
  • Sparse disk image
  • Universal Disk Image Format (UDIF) image
    • uncompressed
    • ADC compressed
    • bzip2 compressed
    • LZFSE/LZVN compressed
    • LZMA compressed
    • zlib/DEFLATE compressed

Unsupported Mac OS image formats:

  • encrypted images
  • Disk Copy format(s)
  • New Disk Image Format (NDIF)
  • Universal Disk Image Format (UDIF) image
    • multi-segment

Work in progress:

  • bzip2 fallback implementation
  • lzma fallback implementation

For more information see:

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