apple can simply make a fat binary of osx like they did in the switch from 68k to ppc, although it took them a while. os8 contains code for both processors so it's not running below it's potential on ppc and still works fine on 68k. i'm assuming that they will do the same when the 970 is used, so the only issue will be updated apps that are 970 only.Originally posted by bikeboy
I've heard that the 970 has the capability to run 32 and 64 bit operations. But can a G4-based machine run a 64 bit version of OS X? What I'm getting at of course is, will all us G3/4 users be shut out once Apple goes 64-bit?