>> I know that the Duet only has single CPU support under MOS9, maybe the same for the Encore?

I'm asking me the same question.

I recently instaled a Maxpower 7448 1.8Ghz dual in one of the two old Sawtoth I have arround here.

The installation instructions said the we have to remove de "Apple CPU Plugins" extension. But if we do this, the multipprocessor libraryes do not load, and the CPU sleep don't work.

The CPU sleep problem, partially is solved by "Sleeper" control panel.

But I could'nt enable de second proccesor in any way.

I try several versions of the "Apple CPU Plugins", and the moderns ones (3.2.2 and up) crash at the startup. And the old ones do no crash, but don't do anything.

Further investigations in one of my two MDD, show me that, even some old version didn't enable multiprocessor in MDD, at least enable deep CPU sleep. This let me to think that the crash in Apple CPU Plugins is related to enabling CPU sleep in 7448.

Due to the crash, this extension couldn't enable the multipprocessor librarys.

Any help will be apreciated. Thanx

Sorry for my bad English.