HFS

HFS (Hierarchical File System), also known as Mac OS Standard format, is the native filesystem format of Apple's Mac OS operating system. It is the predecessor of HFS+.

Identification
The ASCII characters " " appear at offset 1024.

Software

 * Supported natively by Mac OS and OS X (read-only in newer versions).
 * The Linux kernel optionally supports HFS (read+write).
 * HFSExplorer
 * hfsutils
 * 7-Zip [Ed. note: Claims to support HFS, but we've had no luck with it.]

Sample files

 * https://archive.org/details/cdrom-golden-orchard-12 → GoldenOrchard1.2.iso (APM format) → Golden Orchard.hfs

Links

 * Wikipedia article