mikenetaim asks: "Numerous people have started projects aimed at emulating the PPC based Macintosh. Those that run on machines with a PPC tend to succeed (MacOnLinux, Sheepshaver, iFusion), and every single one which attempted to emulate the CPU failed. Everyone admits that an emulated CPU will run slowly, but no one has ever released a working PPC emulator at any speed (except for an incomplete one, whose name escapes me, that was released a long time ago to statically translate AIX binaries). There are a ton of 68k emulation code floating around the 'net, and a PPC emulator should be easier to produce (due to fixed instruction length, branch predication, opcodes that dictate if CCR flags must be generated, etc). Most of the authors just claim their project was harder than they expected before disappearing. Why do all these projects fail? Can anyone point me to any information or code?"