
Alongside OS X Yosemite, Apple today released iTunes 12.0.1, a revamped version of iTunes that's been designed with OS X Yosemite in mind. iTunes 12.0.1 can be downloaded from the Mac App Store and is available for both Mavericks and OS X Yosemite.
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.

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.
Article Link: Apple Releases iTunes 12.0.1 Alongside OS X Yosemite