We reconsidered every element of the Mac interface, large and small. The result is something that feels fresh, but still inherently familiar. Completely new, yet completely Mac. If you want the free instrumental music shown in the video, just go to the link below, it's a high quality 320 kbps m4a file: http://www.mediafire.com/listen/lw7bv9166ezff6q/The_New_Look_of_OS_X_Yosemite.m4a