iTunes 12 offers an elegant new design that incorporates translucency to improve depth. It also has a streamlined toolbar that aims to give users more room to experience content, and it melds the iTunes Store with the Library, making it easier to navigate between personal collections and what’s available in the store.
There are dedicated icons for music, movies, and TV shows, and Recently Added albums, movies, and TV shows are displayed at the top of the library for easy access.
iTunes 12 also includes support for several iOS 8/Yosemite features, including Family Sharing, and it brings improved playlist editing as well.
Apple has also released Security Update 2014-005 for OS X Mavericks.