sorry to bump such an old thread but for those of you that have a mac whose clock speed is too slow to "allow the leopard install c/d to run.......
there is a freeware program called
leopardassist which will "trick the mac" into thinking it has a higher clock speed so you can install leopard (resetting the pram on the restart after install reverts the clock speed back) but there are some macs which are not supported by leopardasssit
case in point is goalie-mom's powerbook g4 dvi 667mhz 768mb ram but i found these instructions
here (
and note there are spaces in the commands)
For those with 667Mhz PowerBooks (Or possibly other Macs that don't work with LeopardAssist):
1.) Place the 10.5 Install disk in your drive.
2.) Restart your Mac (don't use on the installer on the disk)
3.) After the chime, hold down COMMAND+OPTION+O+F until you see a light gray screen with black text
4.) let go of the keys and type in the following commands EXACTLY as shown, and hit the RETURN key after each line (you will see an "ok" confirming what you typed was correct):
dev /cpus/PowerPC,G4@0
d# 867000000 encode-int " clock-frequency" property
d# 867000000 encode-int " min-clock-frequency" property
d# 867000000 encode-int " max-clock-frequency" property
multi-boot
Select Leopard Install DVD
it worked like a charm! took about 90 minutes to install but it runs as fast as it did under tiger and everything works.
and remember, back up before you do it
