Digital Rights Management is supposed to be a platform "to protect and deliver content," according to the Microsoft Web site. In effect, some say Digital Rights Management keeps users from accessing movies and music.
DRM is the reason you can't download movies from Netflix on a Mac.
According to a January post about Mac streaming from Netflix, MacRumors.com states: "A key issue for delivering movies online is that the studios require use of DRM (Digital Rights Management) to protect titles. There's not yet a studio-sanctioned, publicly-available Mac DRM solution (Apple doesn't license theirs)."
And so it goes...Netflix states on it's site that only PCs can be used to stream or download movies from its site.
"You must have a computer running Windows XP with Service Pack 2 or higher, or Windows Vista; Internet Explorer version 6 or higher; Windows Media Player version 11 or higher; an active broadband connection to the Internet; 1.0 GHz processor; 512 MB RAM; 3 GB free hard disk drive space."
Stream may come soon, though, from Microsoft's Silverlight video technology, which will support both Mac and PC platforms.