Download iTunes Store purchases on Mac
When you purchase items in the iTunes Store, you can have them downloaded automatically to multiple computers and devices. This way, all your computers and devices have the same new content, even if you don’t sync them.
Note: Some items may not be available for automatic download in all countries or regions.
Turn on automatic downloads on an authorised computer
In the iTunes app on your Mac, choose iTunes > Preferences, then click Downloads.
Below Automatic Downloads, select the types of content (Music, Movies, and TV Shows) you want to download automatically.
If iTunes is open when you make a purchase on another device or computer, the purchased item is downloaded to your computer at the same time that it’s downloaded to the other device.
If iTunes isn’t open at the time of purchase, the item is downloaded automatically the next time you open iTunes, or when you choose Account > Check for Available Downloads.
Turn on automatic downloads on your iPod touch, iPhone or iPad
Important: Before turning on automatic downloads on an iOS device, make sure you’ve signed into the iTunes Store on the device.
On your device’s Home screen, tap Settings, then tap iTunes & App Stores.
Tap to turn on each type of content (Music, Apps, and Books & Audiobooks) you want to download automatically.