You don't realize how important batch processing is until you are faced with 50 photos that need to be resized from 3872 x 2592 to 640 x 480. Processing each photo one-by-one in an image editing app would take an hour. Instead of wasting your time with such a tedious task, you can turn to an app like Image Bucket, which will do all the work for you.
Image Bucket is a batch image processing app for OS X. It'll let you resize, flip, rotate and watermark a group of images all at once. You can even change the file format of an image or modify the name of a file by tacking on a prefix or postfix.
The app can sit in the dock or at the side of your desktop. You simply select the files or folders you want to batch process a