Installing Leopard on Letterbox
After several mis-steps, I finally got Leopard installed on Letterbox (the iBook G4). Since it misses the cutoff for requirements, I turned to the [OpenFirmware trick][1] on [LowEndMac][1b]. Before trying to install, boot into open firmware and enter:
dev /cpus/PowerPC,G4@0
d# 867000000 encode-int ” clock-frequency” property
boot cd:,\\:tbxi
This will convince the computer that it actually has an 867Mhz processor instead of an 800Mhz processor. Then it boots from the CD and the Installer is happy.
[1]: http://lowendmac.com/osx/leopard/openfirmware.html
[1b]: http://lowendmac.com/
And after I did all that, I found out about the [LeopardAssist][2] tool, which does pretty much the same thing, but without all the typing.
[2]: http://mac.profusehost.net/overview.html