Ok, I need probably be more precise. I have Poser 5, Poser 4 Pro and DAZ Studio on my Mac, running OS X 10.3.7. Both Posers have the old Platinum Club Eagle installed, I have the Phoenix and Roc for the Eagle and both work well. The installer for the update simply does not see the old eagle, no matter to which Poser I'm trying to install 4 or 5, it says the required file does not exist. Also, I cannot use "Extract" install, the Vise installer does not give me this oprion. I re-installed the old eagle, but that didn't help at all. It may be a specific Mac installer problem. As for the DAZ Studio installer...if it is a DAZ Studio Installer, WHY does it open with a Bryce splash screen and install into Bryce????