systemkeychain(8) on macOS
The text 59f64f876efd, 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.
creates system keychains and allows keychains to unlock keychains
Flags it lists
-
-C -
-c -
-f -
-k -
-s -
-t -
-v