Daz Studio 4.5 seems to have some display problems with Mountain Lion, at least on my Mac.
I have the CMS running but the icons in the Content Library will sometimes disappear completely and refuse to reappear until I switch out of Daz Studio to the Finder and then back again. It sometimes takes several goes before it returns to normal.
The main window will sometime disappear as well after switching to another application and the only way I can get it back is by using the “Always on Top” command in the “Window” menu. I find using the minimise feature (The yellow button in the top left of the window) that parks the window in the Dock, prevents the problem when switching applications, so I always do that now before switching away from Daz. I then return to Daz by clicking the window in the Dock.
Mountain Lion seems to have given Daz all sorts of problems. Bryce just crashes and Hexagon, although the new version is much better than it used to be, still behaves very oddly at times and a lot of the keyboard shortcuts don’t work and have to be selected from the menus.