Download of One Photo Backup 1.3.9 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is an intellectual property of One.com A/S. One Photo Backup for Mac relates to System Tools.
From the developer:
One Photo Backup offers a simple way to back up, show, and share your photos and videos. The application can automatically back up your photos and videos across all your devices and computers. This way, you can share your best moments with family and friends.
You may want to check out more Mac applications, such as Mail Backup X, Photo Sketch or Make Your Photos Instaish, which might be related to One Photo Backup.