LeopardAssist creates an artificial 933MHz to clear the 867MHz requirement for installation, configuration and use on systems axed with Apple's latest Mac OS X release. Take your classic G4 to the next level with LeopardAssist.
When Apple released the final system requirements for Mac OS X Leopard, an official cutoff point of 867MHz was introduced leaving several machines, even those just 67mhz below and with dual processors, out in the cold. For these machines Tiger was the only option, until the community was let at it. For those with the time, discs and effort, you could modify the disc. For everyone else, there was Open Firmware, or LeopardAssist.
LeopardAssist originated from LowEndMac in Dylan McDermond's December 6th 2007 post "Faking Out the Leopard Installer with Open Firmware". The simple techniques he used in that article became the basis for the techniques we implemented into LeopardAssist.
The application writes a script into your computers Parameter RAM (PRAM) changing the CPU entry in the device tree to 933MHz. On restart, Open Firmware loads as normal with the 933MHz script in place, switches to CD or DVD and boots from it, where the Leopard installer takes over.
This simple trick means you don't have to modify your DVD to install Leopard. Finally, when installation is done, the Leopard installer will automatically restore the default boot drive and return your Mac to normal operation.
Quick and Simple Leopard, for your older G4.