mount_hfs(8) on macOS
The text 726af7977256, as Mac OS X 10.5.8, Mac OS X 10.5.7, Mac OS X 10.5.6, Mac OS X 10.5.5, Mac OS X 10.5.4, Mac OS X 10.5.3, Mac OS X 10.5.2, Mac OS X 10.5.1, Mac OS X 10.5 shipped it.
mount an HFS/HFS+ file system
Flags it lists
-
-g -
-j -
-m -
-o -
-u -
-w -
-x