Is there any software for OS X that is comparable to VMware? VMware lets you run multiple guest operating systems within the host OS, but it's not really an emulator in the sense that it's not emulating one platform inside of another. Virtual PC isn't what I'm looking for because it emulates i386 on top of PPC. I've googled but all I can find is emulating x86 on PPC, or emulating PPC on x86, but not PPC on PPC.