Maximum HD capacity on a 6100 — #27 One little loophole for those who want to upgrade an x100 to 9.1 and don't have a 9.1 CD - remove the HDD from the Mac and connect it to a newer machine, and run the OS 9.1 updater… 68kMLA Hardware by LCGuy Sun, 4 Oct 2009 - 11:11