Just about anything that works on a pc works on a mac too. The only thing that has been a problem for me is if the paths to the textures are written the pc way "C:Program FilesFolderAnotherFolderOnemorefolderetc. These will have to be edited or Poser will search your hard disk for a very long time. If you're using Poser 4 I think also that the paths to the textures can't contain more than 64 letters(not sure), but the textures can be moved and the paths edited. Stuff you buy is usually OK even if it says that it is only pc, unless it is packed with an installer.