PicBackMan’s Flickr uploader for Mac is an easy to use tool to bulk upload, bulk download and migrate Flickr photos to any other specified online service or cloud account. Using PicBackMan for Mac, you can effortlessly backup your entire photo collection. The automated program will keep a check on any new addition of the photos or sub-folders in the associated folders. As soon as it finds new photos and folders, they ‘ll be automatically uploaded to your Flickr account.
Here is the video tutorial that you can refer to