bless(8) on macOS
The text d379e3565689, as Mac OS X 10.3.9, Mac OS X 10.3.8, Mac OS X 10.3.7, Mac OS X 10.3.6, Mac OS X 10.3.5, Mac OS X 10.3.4, Mac OS X 10.3.3, Mac OS X 10.3.2, Mac OS X 10.3.1, Mac OS X 10.3 shipped it.
set volume bootability and startup disk options
Flags it lists
-
-bootBlockFile -
-bootBlocks -
-bootinfo -
-device -
-folder -
-folder9 -
-format -
-fsargs -
-info -
-label -
-labelfile -
-mount -
-openfolder -
-plist -
-quiet -
-save9 -
-saveX -
-setBoot -
-setOF -
-startupfile -
-system -
-systemfile -
-use9 -
-verbose -
-version -
-wrapper -
-xcoff