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Apple Demos Leopard Before iPhone Debut: Page 3 of 3

Jobs also highlighted Apple's relationship with Intel by inviting its CEO, Paul Otellini, to commemorate the development of Intel-based Macs. The two men hinted that they were "working on some great stuff for some future products." Jobs later noted that Leopard would be the first full native 64-bit operating system that guaranteed 32-bit compatibility. While all of the new Macintosh computers are running Intel x86 chips, it's not known yet how compatible Leopard will be with older Apple machines running a G5 or G4 processor.