syslog(1) on macOS

The text b9c2c593731b, as OS X 10.11.6, OS X 10.11.5, OS X 10.11.4, OS X 10.11.3, OS X 10.11.2, OS X 10.11.1, OS X 10.11 shipped it.

Apple System Log utility

syslog(1) on macOS now