MAC os 9 wont boot MAC os 9 wont boot dragonman (IS/IT--Management) (OP) 18 Jul 01 06:22 I loaded Mac OS 9 on to a power pc ide drive and it loaded fine. It is set to mount automatically but the computer will not startup from the new drive. Any suggestions would be appreciated! RE: MAC os 9 wont boot newenglandgreen (IS/IT--Management) 19 Jul 01 10:23 It is very likely to be a disk driver issue. Has it been formatted with a 3rd party driver?What model Mac is it in?Does the disk mount if you boot from another disk/CD? RE: MAC os 9 wont boot dragonman (IS/IT--Management) (OP) 19 Jul 01 10:41 Thanks for the reply. It was a G3 desktop and my stupidity. The drive did not have the jumper set for single/master!