I have a power mac g5 and i wantede to get it upto date with all new softwere i.e. os x mountain lion
Hello, sorry to report, 10.5.8 IS the highest any G5 can go.
10.6 requires an Intel CPUed Mac.
10.7 doesn' even run on some of those.
10.8 runs on even fewer IntelMacs.
But, you list Mac Pro & Power Mac G5, which look similar outside, but are completely different inside. Mac Pro has 2 optical bays on the front, G5 PM has only one optical bay.
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