i tryed viewing the new iMac ads on apple.com , i get a pop up that says it cant find some software to run it , i tryed uninstalling and updateing but it wouldent work , it runs on my windows PC , i downloaded it and put it to my mac from my network , it is saying now that it cant find the right Compressor/codec , Any help ? , i think its the HD codec , i can get Audio , but no video