1: Create an album
You can make an existing album accessible from another networked Mac, or create one to be shared. Add the photos you want to share to an album.
2: Change preferences
Go to iPhoto>Preferences. Click on the Sharing tab. The Sharing window will appear. Tick Share My Photos and the name of the album to be shared.
3: Password protection
The Shared name field will automatically add your Mac’s name, but you can change this. Tick Require Password and type one in. Close the window.
4: Open another iPhoto
Open iPhoto on another locally networked Mac. Go to iPhoto>Preferences>Sharing and tick the Look for shared photos box.
5: Click the drop-down
Click on the Shared pane’s drop-down icon and you’ll see a link to the shared iPhoto library that you set up on your first Mac.
6: Type in password
Click on the shared link. If you set up a password on your shared album earlier, type it into the photo library’s Password field now. Click OK.
7: Browse shared files
Toggle open the shared photo library to see a link to any shared albums. Click on one. You can browse its shots as if they were on your own machine.
8: Copy shots
If you try to edit a shot from a shared album, you’ll be told that you can’t. But you can import from the shared album into your second Mac’s iPhoto library.