This article is about a bootloader used to boot Linux on PowerPC Macs and is not to be confused with BootX (Apple), a similarly-named Mac OS X bootloader.
BootX is a graphical bootloader developed by Benjamin Herrenschmidt, which runs as an application or an extension to Mac OS 8 and 9 that allows Old World Apple computers to dualbootLinux.[1][2] It uses code derived from quik, a replacement boot loader for PCI-based Old World Apple computers using Open Firmware.
BootX requires a Linux kernel and compressed ramdisk image to be available in the Mac's system folder.[3] It will then automatically choose which partition becomes the root partition.[4]