fs_usage(1) on macOS
The text dec764f7e1fb, as Mac OS X 10.8.5, Mac OS X 10.8.4, Mac OS X 10.8.3, Mac OS X 10.8.2, Mac OS X 10.8.1, Mac OS X 10.8, Mac OS X 10.7.5, Mac OS X 10.7.4, Mac OS X 10.7.3, Mac OS X 10.7.2, Mac OS X 10.7.1, Mac OS X 10.7 shipped it.
report system calls and page faults related to filesystem activity in real-time
Flags it lists
-
-E -
-R -
-S -
-e -
-f -
-w