How to Use iPhoto Photo Stream on Your MacBook
iPhoto includes the Photo Stream feature that automatically shares the photos you take among your Macs, your PCs, and any Apple device running iOS 5.0 or later. (This includes your iPhone 4 or later, your second- or later-generation iPad, and your iPod touch.) Click Share and choose Photo Stream. iPhoto automatically sends the selected images to all compatible devices over your Wi-Fi connection.
Note that all devices using Photo Stream must be configured using the same Apple ID.)
To turn on Photo Stream, choose iPhoto→Preferences and click the iCloud toolbar button. Then select the My Photo Stream check box.
Optionally, you can also specify whether iPhoto should automatically import Photo Stream photos to you library. Furthermore, you can specify whether iPhoto should automatically upload the most recent 1,000 photos to Photo Stream for sharing with your other devices.
You can also choose to share specific photos by using shared photo streams, which can be turned on from the iPhoto Preferences dialog. Choose iPhoto→Preferences, click the iCloud tab on the toolbar, and select the Photo Sharing check box.
To subscribe to a shared photo stream invitation from another person, click the iCloud entry in the Source list, click the desired shared stream entry, and then click Accept.
To create your own shared photo stream, select the images you want to share, click the Share button on the toolbar, click the iCloud button, and then click the New Photo Stream menu item that appears. iPhoto prompts you for the e-mail addresses of the folks you want to invite to your shared photo stream. After you have entered each e-mail address, click the Share button in the dialog.
When creating a shared photo stream, don’t forget to select the Public website check box if you want to share images with friends and family who don’t own a Mac or an iOS device.