LeopardAssist 2.0 Helps Install Leopard On Some Unsupported Macs
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 structure we were about to use.
LeopardAssist does just what was posted in his article. Using a temporary Open Firmware "trick", it changes the reported CPU speed to 867mhz and starts the installer from CD.
The application writes a script into your computers Parameter RAM (PRAM) changing the CPU entry in the device tree to 867mhz. On restart, Open Firmware loads as normal with the 867mhz 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 or when installation is ready to reboot, you simply flash the PRAM back to restore the original CPU speed and restore booting from the hard disk.
That's all there is to it!
No modified Leopard DVD's, no hardware hacks or tweaks, just a one-time run application. (Much like XPostFacto)
Version 2.0 overhauls the codebase at the request of testers worldwide. It attempts to improve support across all systems, including ones previously known unsupported or problematic. This version also attempts sports a completely rewritten user interface.
New in version 2.0:
• Eliminated Boot File, data is written directly to PRAM
• Major Bug Fixes
• New User Interface
• Tested on second generation PowerPCs (eMac G4)
System requirements:
Mac OS X 10.3.9 or later (10.4.11 is recommended).
System Support:
PPC
Free
For more information, visit:
http://mac.profusehost.net/
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