Home Sharing allows you to browse and stream music and video stored in iTunes on a Mac or PC to your iPhone. Sadly, the ability to use it for music was removed in iOS 8.4. Apple promised it would return, and that’s the case with iOS 9. Go to Settings > Music on your iOS device, scroll down and look for your Apple ID’s email address under the Home Sharing heading, or tap Sign In there and enter your credentials. Once signed in, open iTunes on your Mac, switch to the Music app’s My Music tab, tap where the current view (Artists, for example) is listed, select Home Sharing, then choose a library.