bandolin, Setting default programs works in a similar way on the Mac. First, select one of your Poser files in the Finder. Then, press Command (a.k.a. "Apple")-I. In the Get Info window that comes up, click the arrow next to "Open With." You'll see a popup menu that will contain a number of choices. Hopefully, Poser will be listed. If not, you'll have to choose "Other..." and browse to where you have Poser installed to select it. After you've got Poser selected, click the button in the Get Info window that says "Change All..." I've found that sometimes (at least with Jaguar, which I'm using), "Change All..." will change it back to what it was before. I've only had it happen if the program I wanted was already in the list. If that happens, use the method where you browse for another program. That seems to work for me.