The Apple Drive Setup application can be found in the Utilities folder on the MacOS CD. It will not adjust existing partitions; it is limited to partitioning the entire disk at once. The disk driver partitions don't show up in Drive Setup. Remember to create a placeholder partition for GNU/Linux, preferably positioned first in the disk layout. it doesn't matter what type it is, it will be deleted and replaced later inside the &debian-gnu; installer. If you are planning to install both MacOS 9 and OS X, it is best to create separate partitions for OS 9 and OS X. If they are installed on the same partition, Startup Disk (and reboot) must be used to select between the two; the choice between the two systems can't be made at boot time. With separate partitions, separate options for OS 9 and OS X will appear when holding the option key at boot time, and separate options can be installed in the yaboot boot menu as well. Also, Startup Disk will de-bless all other mountable partitions, which can affect GNU/Linux booting. Both OS 9 and OS X partitions will be accessible from either OS 9 or OS X. GNU/Linux is unable to access information on UFS partitions, but does support HFS+ (aka MacOS Extended) partitions. OS X requires one of these two types for its boot partition. MacOS 9 can be installed on either HFS (aka MacOS Standard) or HFS+. To share information between the MacOS and GNU/Linux systems, an exchange partition is handy. HFS, HFS+ and MS-DOS FAT partitions are supported by both MacOS and Linux.