Renting a movie through i Tunes on a computer can be streamed to an Apple TV on the same network by using Air Play.But if you want to watch that same rental on an i Pad or i Phone, you must connect the device to i Tunes and transfer the file, after which it exists only on the device (and you need an Internet connection so i Tunes can verify the transfer with the Apple mothership).
The confirmation arrives almost instantly to your Mac and i OS devices, letting you decide right away if the purchase should be processed (see Figure 1).
That list includes plenty of devices: the i Phone 4S and later, i Pad 2 and later (including the i Pad mini), the fifth-generation i Pod touch.
Yosemite can be installed on Macs that are up to eight years old: The more practical consideration is that everyone needs to be on i OS 8 or Yosemite to take advantage of Family Sharing; someone holding out with an earlier version can’t join the digital family.
If you rent a movie on an i OS device, you can watch it on the Apple TV via Air Play, or on the device itself.
One thing most people definitely want to share with family members is digital photos.