New to Mac.....less than a week on my new iMac 24. I've quickly learned that Windows Media Player format dominates the web. I can't even run samples of songs off Amazon, or view certain video content without it. So, I go to Microsoft to download it: First, I try the "Flip 4 Mac" plugins. It doesn't seem to solve my problem. Second, I try to download Windows Media for Mac, but the download file is some .sitx format. Does this mean I now have to download Stuffit Expander to load up the Media Player?? Seems so, but I thought I'd check to see if there's an equivalent already loaded in the OS X. Thanks in advance for your tips.