Try booting off the OS 9 install disk that shipped with the computer. The only supported version of the OS that will install on these is the version of 9.2.2 that shipped with the computer; retail 9.2.2 or anything earlier probably won't work. http://docs.info.apple.com/article.html?artnum=25114 Bryan Forbes <bforbes at forbesonline.org> > I've wiped a HD on a recently purchased 1 mghtz Tibook and am > attempting to load OS 9 and Panther on separate partitions. I'm > getting a system error type 11 when I attempt to boot off of a OS 9.2.1 > cd to load OS 9 onto the smaller partition. Prior to that I used disk > utility from the Panther cd to partition the drives ... I formatted > both the OS 9 and OS X partitions as Mac OS Extended (Journaled). Is > that where my problem lies? Will OS 9 not load on that format? I'm > stuck until, I can get beyond this point.