A boot loader for New world Macs. It runs inside Open Firmware and is capable of running a Linux kernel or booting to another installed OS. Yaboot is effectively the Mac equivilent of LILO, but has one advantage in that it can use the Open Firmware network drivers to download a kernel via TFTP (and can be obtained by TFTP itself, if the correct Open Firmware variables are set). Old world Macs use quik instead.