disk image won't mount
i am new here tonight.
I am trying to watch a movie on my mac - first through quick time which said that i needed a codec to watch avi movies... I tried the download of divXinstaller.dmg - i got the window," disk image won't mount" - i then tried Mplayer, and others, including an upgrade of real player and all arrive at the same error, ... disk image won't mount.
i tied to open it in disk utility and also, cannot do it from there.
thanks so much. I really just want to watch a movie...