Starting on August 22, 2016, the Dropbox desktop app will end support for the iPhoto importer feature. After this date, you can't use the iPhoto importer to upload photos. Apple discontinued iPhoto in 2015 and replaced it with Photos. We’re ending support for the iPhoto importer to keep our offerings aligned with Apple.
All photos you previously imported from iPhoto are safe in your Dropbox.
Other methods for uploading photos
There are many other ways to add photos to your Dropbox, including: