Go on and type in your Apple username and password then click the Create Home Share button.
That’s it for home sharing. Now you’ve to select what images you want to share with your Apple TV. To get this done, go ahead and click on Advanced again and click on Choose Photos to Share.
On a Mac, you’ll get the Photo Sharing Preferences dialog that instantly defaults to iPhoto, that is packaged with all Mac computer systems. You may either leave this as it’s or you can select a specific folder if you’d like. If using iPhoto, you have the choice of sharing all events or selecting personally.
Note that if you have a lot of pictures, i.e. 20,000+ pictures, you might run into a problem getting your pictures to in fact load on your Apple TV. Unsurprisingly, there are several people whose libraries basically will not load on the Apple TV due to the size. The Apple TV has 8GB of storage space and will try to load the entire library into memory. Therefore libraries with over 20,000 pictures seems to never load. You are able to work around this for the time being by choosing particular events to share rather than the whole library.
When you have turned on picture sharing from iTunes, see your Apple TV and go the Computers. Presently there you need to see the library you’ve shared. When you open the library, you will notice the option for Pictures at the very bottom.
Note that you may also have iTunes installed on multiple pc’s and share pictures from each of those computers to your Apple TV. All of you need to do is be sure to create the home share using the same username and password on each computer. So it’s very easy to see pictures from your Mac and your Computer on your Apple TV. That’s it!
If you run into any issues or can not get your pictures showing up on your Apple TV, post a comment here with your setup and I’ll try to help. Enjoy!