iTunes is both a media player, a media library, a internet radio broadcaster, a mobile device management utility and it’s also the main client application for the iTunes Store. Itunes was developed by Apple. Regarding its features, you can use it to buy, play, download and organize digital media on personal computers, desktops or laptops. It is therefore a rich client application if we want to use more technical terms. The operating systems or OS are macOS and Windows. With iTunes, you can also rip music from CD or DVD, use dynamic and smart playlists to play multimedia content.
Itunes ON macoS !
MacOS is the operating system installed on Apple Desktops and Laptops…
Instead of remaking the wheel, Apple has preferred to use the iTunes fundations as a template to develop a similar application for macOS.