This is one of the most common problems that most users will encounter. For example, when you sync music to your iPhone, iTunes just crashes, and stops responding, or just freezes immediately after plugging your device. However, sometimes things will act up for iTunes. For the majority of Apple users, iTunes is the best way on your Mac and Windows to play and manage media files like music, videos and TV shows and allows you to get what you want with a large selection of songs and movies on iTunes Store.