When I clicked on the first one, it asked me somethink about Quicktime or a MP3 or MP4 player. But, I would think you would have these on a relatively new MAC. So, I don't know. Maybe someone else has a suggestion. The file size for the Quicktime versions is too large ...20 to 30 Mbytes. If you have a high speed connection I could email you attached the .mpeg file for the first one to see if it works...I have your email address. Filesize is about 4 Mbytes or so on each. Chris