iotop(1m) on macOS
The text 23851e05df3a, 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.
display top disk I/O events by process. Uses DTrace.
Flags it lists
-
-C -
-D -
-P -
-Z -
-d -
-f -
-j -
-m -
-o -
-t