This is my first mac and i love it, I just can't seem to get all video extensions to play.. (.avi, .wmv, .mpg, etc) I downloaded Windows Media Player for Mac and it just opened a large binary file in Excel... I couldn't install it. I have Divx player... I'm just having trouble playing videos I'm used to playing in my other Windows machines. Any advice or tech articles i could read or anything? Thanks for any help.