Exciting, isn't it. Nowhere does it say that Poser6 for OSX 3, would run with all new versions of every new OS. Tiger is NOT a service update. Please, give CL time to release their OSX 4 compatible version. This is not unexpected as Apple has widely stated that they are working with the GPU suppliers to ensure tight integration between OSX and their chips. This is taking OS graphics to the next level. Software that still relies on large amounts of very old legacy code will break, sooner or later. Look for a Poser 6, Tiger update coming soon(er or later). PS see the earlier thread and the Mac Forum and threads on other sites for more info, this is the hottest news around:-)