This page briefly describes the sequence of events that happen when Mac OS X boots. Some details of the boot process from power-on until the kernel is up and running are covered in Booting Mac OS X and XNU: The Kernel. To recapitulate:
Kerberos for Macintosh is an implementation of the Kerberos authentication system for Mac OS X. It is based on the MIT Kerberos implementation and provides Kerberos v5 and Kerberos v4 protocols, GSSAPI, a graphical authentication interface and accompanyin