Yesterday, Apple launched iTunes 11. One thing you’ll notice is that it is very minimal – replacing menus for beautiful coverart. In addition, the sidebar where you could easily organize your playlists and access your devices is now missing as well.
For most users, iTunes 11 will take some getting used to. Fortunately, if you want the missing sidebar in iTunes 11, you can bring it back – without any hacking or special tweaks. All you need to do is follow these instructions.
How to restore the missing sidebar in iTunes 11