Well, the thing is that we can hardly test it, because we don't have any MACs here. Sure, we can test it in VirtualPC for Windows, but I believe the technology underneath is very different (virtualization, instead of emulation) - since the CPU is the same.
No parts of avast! can be loaded? I mean, the installation is finished without any errors, right? Can you manually start some of the avast! executables, such as ashSimple.exe, ashLogV.exe, ashChest.exe... ?