syslog(1) on macOS
The text f6bd14ca54f2, as OS X 10.10.5, OS X 10.10.4, OS X 10.10.3, OS X 10.10.2, OS X 10.10.1, OS X 10.10 shipped it.
Apple System Log utility
The text f6bd14ca54f2, as OS X 10.10.5, OS X 10.10.4, OS X 10.10.3, OS X 10.10.2, OS X 10.10.1, OS X 10.10 shipped it.
Apple System Log utility