OS4 won't work. Moana is hard-coded to require PowerMac10,2 hardware, which corresponds to the Mac Mini G4 "silent update" (1.33GHz and 1.5GHz machines only). Besides, it's an old, buggy, beta version of OS4. The kernel and drivers are incomplete, barely work
Did you check?
"barely work"
That's exactly what for A1 G4. So running OS4.
