iTunes 10 for Mac: Automatically download your new iTunes Store purchases to multiple computers and devices
When you purchase items in the iTunes Store, you can have them download automatically to multiple computers and devices, not just the one you use to make the purchase. That way, all your computers and devices can have the same new content, even if you don’t sync them.
To do this, you need to turn on automatic downloads on each computer and device you want new content automatically downloaded to.
You can turn on automatic downloads on a total of up to ten devices and computers, combined. You can authorize up to five computers at a time with an Apple ID.
To turn on automatic downloads on an authorized computer:
In iTunes, choose iTunes > Preferences, and then click Store.
Below Automatic Downloads, select any or all of the content types (Music, Apps, and Books) you want to download automatically.
If you’re using Mac OS X v10.6.7 or later, and iTunes is open when you make a purchase on one of your devices or other computers, the purchased item downloads to your computer at the same time that it downloads to your device.
If iTunes isn’t open at the time of purchase, or if you’re using Mac OS X v10.6.6 or earlier, the item downloads automatically the next time you open iTunes, or when you choose Store > “Check for available downloads.”
To turn on automatic downloads on your iPod touch, iPhone, or iPad:
On your device’s Home screen, tap Settings, and then tap Store.
Tap the switch to On for each content type (Music, Apps, and Books) you want to download automatically.