There was a version of OS 8 that was supposed to boot on the CHRP Starmax 6000, but Apple refused to certify CHRP Macs (probably because they smoked Apple's own hardware).

If you dig out OS 8.1, you might get lucky and get it working. Or maybe 8.2. But I highly doubt it because the OS probably doesn't know how to use the hardware in one of these boxes.

Peace,
Drew
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Power to the PowerPC!