The PhotoStream2Folder application will help to copy the pictures located in your PhotoStream folder to a folder of your choice on your Mac computer.
This will help for a Lightroom integration with iCloud’s PhotoStream, or integration with Dropbox or other picture management applications.
In addition to that, PhotoStream2Folder can automatically add Lightroom compatible keywords and City/State/Country exif data based on GPS locations.
This software is free of use, however please consider supporting the developer.

