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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: