Thank you Satcomer and MisterMe.
Here is the problem: I had stuff to do since I bought and downloaded the MPEG-2, so I could not respond to you until now. It has been days, and now, I can't find MPEG-2 anywhere on my computer, not on recent downloads, not anywhere. I am a total Mac amateur...
So I bought MPEG 2 from mac, installed it, restarted the computer, but I still cannot watch the mpg movie. I get an error message saying I don't have the right software.
I bought my imac only in January so there shouldn't be an incompatibility!
I am new to mac. Is there something...