Dropbox is an online photo & video backup service. Dropbox is one of the best desktop application available in the app store and it is helpful in file synchronization. You need to download and install 'Dropbox Desktop Application' on your Mac to sync your iPhoto Library with Dropbox. To sync iPhoto library to your Mac, you will need to find the file for the existing iPhoto library in 'Picture' folder. When you install Dropbox on your Mac, it will create a dedicated folder i.e Dropbox folder on your Mac for storing your photos, videos and files. You can simply drag your iPhoto library from the Picture folder directly to Dropbox folder on your Mac.
You can install PicBackMan's Dropbox uploader for Mac from the website and start backing up photos and videos.
Quick Tip to ensure your Photos never go missing
Photos are precious memories and all of us never want to ever lose them to hard disk crashes or missing drives. PicBackMan is the easiest and simplest way to keep your photos safely backed up in one or more online accounts. Simply download PicBackMan (it's free!), register your account, connect to your online store and tell PicBackMan where your photos are - PicBackMan does the rest, automatically. It bulk uploads all photos and keeps looking for new ones and uploads those too. You don't have to ever touch it.