<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Greetings Rod ( + )!( + )<div><br></div><div>I could be mistaken but are you saying that you need a copy of OS 9 to install the Sonnet 1.8 CPU?</div><div><br></div><div>If I'm correct then the other responses that you have received have no meaning what so ever.</div><div><br></div><div>When I installed my new PowerLogix, 1.2GHz processor it was necessary to start from OS 9 so that the new CPU could be configured to the G4 platform. Then once the new CPU was configured I could start from and run any of the Apple Operating Systems (well I've only tried OS 9, through OS X 10.5.6) without any problems.</div><div><br></div><div>Here are the installation instructions that came with the PowerLogix processor.</div><div><br></div><div><span class="Apple-style-span" style="font-family: Times; font-size: 16px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "><b>Firmware Patching:</b> Since these CPU upgrades are based on the 7447A and 7457, you must patch the system firmware before installing the CPU module. The included Powerlogix CD is bootable and has a patcher included. The install guide covers this procedure, but basically it's similar to applying an apple firmware update. You hold in the programmers button/switch on the front of the case while pressing the power button. Hold both until you hear the high pitched tone, then release them and hold the C key to boot from the PL CD. The PL CD boots into open firmware and automatically runs a script that shows a menu of options. Pressing the "4" option applies all the patches (system firmware, OS 9.x NVRAM patch, etc.). If the firmware has already been patched the script checks for that and displays a menu to remove any or all of the patches. </span></div><div><br><div><div><div>On Sep 30, 2008, at 5:26 AM, LeBron Rod wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><table cellspacing="0" cellpadding="0" border="0" style="position: static; z-index: auto; "><tbody><tr><td valign="top" style="font: inherit;"><div id="yiv1747836255"> <div id="yiv101613560">I recently purchased a Power Mac G4 AGP 500MHz Single Core CPU, 100Mhz Bus, 60G Hard drive, 2G RAM (upgraded by me), running OS 10.2.8. I then purchased an upgrade Sonnet 1.8GHz CPU. The problem that I have run into is that the firmware that came with the new CPU requires that you boot from OS 9 in the Start Disk.</div></div></td></tr></tbody></table> _______________________________________________<br><br></blockquote></div><br></div></div></body></html>