alterImage 2.0 for Mac was available as a free download on our application library. The program is included in Design & Photo Tools. This Mac app was originally produced by Rob DuToit Frames.
From the developer:
alterImage helps you crop, scale, size, rotate, convert, and rename a single image or a folder of images. It is fast, efficient, and very useful for anyone who works with images and graphics. You can see the image in the info panel and any editing you have selected will be reflected, so that you can see the resulting image's size, resolution, and other details. This way you know exactly what editing will take place.
You may want to check out more Mac applications, such as Cuadro or Resize Now, which might be similar to alterImage.