I have found that the Aiko model is unstable in OS X if any textures or bump maps (or other files that are called during loading) are missing. Poser 4 will load the Aiko model with the usual "Do you want to continue searching" prompt, but Poser 5 just "quits unexpectedly", meaning it's probably Poser 5's fault. Or Daz's fault for failing to play nice with Poser 5, but I doubt it.