Home Sharing among your family computers
Home Sharing enables you to stream or transfer music, movies, TV shows, apps, and more among up to five authorized computers in your household. To do so, turn on Home Sharing on each computer using the same Apple ID. Once you've turned on Home Sharing, all of the libraries from your computers will show up in the Shared section in the upper-right corner of iTunes. If you don't see the shared section in the upper-right corner of iTunes, double-check to make sure that every computer is on the same network.
With Home Sharing, you can stream music and video from one authorized computer to another, or drag music between computer libraries. You can also choose to have iTunes automatically import purchases you make on any of your Home Sharing computers to your own library. To do so, select the library from the upper-left corner of iTunes. Then click on the Settings menu in the lower right corner of the Home Sharing window. Select what you'd like to import from the pop-up window.
Home Sharing with your iPhone, iPad, iPod touch, and Apple TV (2nd generation or later)
Home Sharing also allows you to play your content on your iOS devices (running iOS 4.3 or later) and Apple TV (2nd generation or later) by streaming from your computer. You'll need to turn on Home Sharing on the devices and use the same Apple ID on each device on your home Wi-Fi network.
For more information on the minimum requirements and how to set up or troubleshoot Home Sharing for your household, visit the Home Sharing support page.