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How To Identify (find, determine) System Firmware on Mac G4 AGP

Last Modified: 2013-11-17
The system is a Mac G4 AGP 350mhz (sawtooth M7827) running OSX 10.3

My apple reseller tells me that Apple Software Update should tell me if a firmware update is required, but it does not. From what I am able to determine from Apple support, the latest release of the system software AVAILABLE for this machine is 4.2.8.

That said, I am unable to identify what version the system is running. System Profiler doesn't indicate any system information, numbers, revisions, etc that even look like a "4.x.x" numbering scheme. Documents on the web say that this information should be under "production information" or "product information."

It does say, however, that the Boot ROM version is "151"

How can I be assured of what system firmware this machine is running, why doesn't it conform to the "4.x.x" numbering, or should I be able to update this machine?

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