The slightly more modern and stable alternative to Apple Midi Manager is called OMS. It may require System 7, I can't recall.

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---That would be perfect. I have got System 7 on a Mac Classic. Chances are that OMS would be a far better option.

I would be using the Mac with Cubase and a pair of rhythm units. I know I began stating I would use Performer, but I find Cubase a much better option for my specific needs.

Where could I get/buy OMS? Do I strictly need it to work with Cubase and Midiman MacMan adapter?

Here's the MacMan, from Midiman:

http://personales.ya.com/juanjavier_xxx/1e3a_1.JPG

Regards...