Manually transfer photos between Aperture and My Photo Stream
You can choose which photos in your Aperture library you want to upload to My Photo Stream. You can also manually download from My Photo Stream just the photos you want to store in your Aperture library.
Note: To transfer photos between Aperture and My Photo Stream, you must have an Internet connection.
Manually upload photos to My Photo Stream
In the Library inspector, select the item containing the photos you want to upload to My Photo Stream.
In the Browser, select the photos you want to upload to My Photo Stream, and do one of the following:
Choose File > Share > iCloud.
Choose iCloud from the Share pop-up menu in the toolbar.
Drag the photos to the iCloud item in the Library inspector.
In the iCloud dialog, choose My Photo Stream from the Stream pop-up menu, and click OK.
The photos are uploaded to iCloud and immediately pushed to the iOS devices connected to your iCloud account. Photos remain in iCloud for 30 days and are then removed automatically—unless you delete them first.
Manually download photos from My Photo Stream
In the Library inspector, select iCloud, and double-click My Photo Stream.
Select the photos you want to download from My Photo Stream, and drag them to a project or an album in the Library inspector.
The photos from My Photo Stream are downloaded to the specified project in Aperture and are permanently stored on your Mac—unless you manually delete them. For more information about deleting images in Aperture, see Work with the Aperture Trash.