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OVERVIEW


Apple Macintosh computers use the HFS (or HFS+) file system on hard disks, mainly.

The HFS file system has more properties than FAT file systems (which are mainly used on the Windows operating system) do, for example:

  • date of last backup

  • file type

  • creator code

  • flags and data for display

  • reference to a resource fork


When Apple saw the need to store Macintosh files on CD-ROMs in a way that was still readable by non-Macintosh systems, they chose to use the ISO 9660 format and extended it.

The way the extended information gets stored on an ISO 9660 volume allows a non-aware operating system to still be able to read most of the Macintosh file data.

The result is that the above listed information is simply not visible to the non-aware system, but it would not be able to use that information, anyway, most of the time.


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