More dual G5 troubleshooting. Even though this mac is under “applecare” they seem hesitant to believe it doesn’t work. So I’ve pulled all third party ram out — no change. Now I’ve disabled a processor by going to Open Firmware. Here’s how you do it:
– reset machine
– immediately hold cmd-option-O-F to enter Open Firmware
– disable second CPU by typing: setenv boot-args cpus=1
– warm boot by typing: mac-boot
This setting is “sticky” and, as such, until you enter “setenv boot-args cpus=2” at the open firmware prompt, your machine will effectively be a single processor machine.
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