appletvhome-sharing
When using Home Sharing on Apple TV 3rd gen, the Mac will fall asleep even though it is needed to stream content. So in the middle of a movie the connection will be lost because the Mac goes to sleep.
Why does it not stay awake? It seems like a big oversight on Apple's part.
Firstly, in order for AppleTV to see the iTunes Library a user must be logged in and running iTunes. If both of these are not present then AppleTV won't work.
Since they are on the same physical Mac might I recommend combining the iTunes Media folder and placing it in the /Users/Shared/ directory. As all users have access to the Shared directory the actual media files wouldn't be duplicated and they can each maintain their own iTunes Library. After moving the iTunes Media folder to the Shared folder you will need to go into iTunes Preferences for each user and under the Advanced tab select the new iTunes Media folder location.
I had something similar happen with a rented film.
The only thing that I can recommend that you try is that you contact the iTunes store customer support and explain your issue, they will most likely give you a refund and you can delete the movie and try re-purchasing it.
Best Answer
You might want to try going to
If you find the need to put the display to sleep because you want to have the computer on and running for whatever reason then I would suggest going to the Screen Saver options and enabling Hot Corners. In that screen you can make the display go to sleep or trigger a screen saver by moving the mouse cursor to a corner on your screen.
Source: That is my current setup. No Display Sleep on unless I'm running a lengthy Time Machine Backup overnight.