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Joachim Metz edited this page May 14, 2026 · 8 revisions

libfshfs is a library to access the Hierarchical File System (HFS) format.

Project information:

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

Read-only supported HFS formats:

  • HFS+, Mac OS 10.3 and later (Unicode 3.2 case-insensitive)
  • HFSX, Mac OS 10.3 and later (Unicode 3.2 case-sensitive)

Unsupported HFS formats:

  • (traditional) HFS
  • HFS+, Mac OS 8.1 through 10.2 (Unicode 2.1 case-insensitive)
  • HFSX, Mac OS 8.1 through 10.2 (Unicode 2.1 case-sensitive)

Supported HFS format features:

  • ZLIB (DEFLATE) compression
  • LZVN compression
  • extended attributes

Unsupported HFS format features:

  • LZFSE compression, compression methods 11 and 12
  • "uncompressed", compression methods 1, 9 and 10

Planned:

  • Complete extents extended attribute value data (kHFSPlusAttrExtents) support

For more information see:

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