How do I turn on my Second Processor on my Dual G4?

By Default it is on.Mac OS9 does not use the second processor however.
You would need a Program that supports the Second Processor directly like
Digital Performer, Logic or Cubase.
In these Programs you would select "Use Multiprocessor" ect..then relaunch if needed.
But for any of this to work you should first confirm that the "AppleCPU Plugin" is in the "MultiProcessing" folder in the "Extensions" folder which is in your "System" folder on the Mac HD.

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