If you are not signed in, click on the "Preferences" button and click "Sign In." to enter your Shutterfly user name (e-mail address) and password.
Click on the "Shutterfly" tab in the iPhoto Export window.
Select the "Export" function under the iPhoto "File" menu.
From within iPhoto, select individual pictures or an entire iPhoto Event to upload to your Shutterfly account.
To Use Shutterfly Export Assistant for iPhoto:
Launch iPhoto again to begin transferring your pictures to Shutterfly.
Follow the on-screen instructions to complete the installation process.
In System Preferences > Security & Privacy > General, choose "Allow applications downloaded from: Anywhere." If you get an error message, you may need to adjust your security settings.
The installer window will launch automatically.
To check your Mac OS version, click the Apple icon in the top left of your screen, and select "About this Mac." To check your iPhoto version, select iPhoto > About iPhoto from the program's menu. The plugin will work with Mac OS 10.6 and iPhoto 8 onwards.
Download the Shutterfly Export Assistant for iPhoto.
If you are running iPhoto, please exit the application prior to installing the Shutterfly iPhoto Export Assistant.
This one-time installation takes just a minute or two. You are downloading the Shutterfly Export Assistant for iPhoto, a tool that makes it faster and easier to transfer pictures to Shutterfly directly from iPhoto. Export Assistant for iPhoto Installation