Log a message to console in text mode, and /var/log/system.log.
- macOS 10.0+
- DriverKit 19.0+
A printf() style format string (see printf(3) documentation).
arguments described by the format string.
This function allows a driver to log diagnostic information to the screen during verbose boots, and to a log file found at /var/log/system.log. IOLog should not be called from interrupt context.