Oddly released without any fanfare in beta form to developers back in July, iTunes 12 has officially debuted at Apple’s media event today. As noted in our What’s New in iTunes 12 article, the Mac and PC application has received a “flatter” cosmetic overhaul inspired by iOS 7 and iOS 8. It largely does away with the traditional sidebar found in earlier versions of iTunes — a feature that was hidden but still present in iTunes 11 — to embrace a more media library-heavy interface. Various types of media are now individually browsed and managed using icons at the upper left of the iTunes window, with separate iTunes Store access points for each medium.
iTunes 12 has been announced for OS X Yosemite, but not yet for older versions of OS X or Windows PCs. Updated: It is now available for download for OS X 10.7.5 and newer through iTunes.com, as well as for Windows XP and newer.