mount(8) on macOS
The text 476645669177, as OS X 10.9.5, OS X 10.9.4, OS X 10.9.3, OS X 10.9.2, OS X 10.9.1, OS X 10.9 shipped it.
mount file systems
Flags it lists
-
-a -
-d -
-f -
-o -
-r -
-u -
-v -
-w