You could have downloaded SuperGIF 1.5.2 for Mac from our application library for free. The software belongs to Design & Photo Tools. This software for Mac OS X is a product of BoxTop Software.
From the developer:
SuperGIF is an application that helps you make all your GIF images and animations smaller. The interface might be unimpressive with only its fancy progress bar and simple preferences dialog, but the results will impress you. No matter what other tools you use to create GIF images and animations, SuperGIF will help you make them smaller.
You may want to check out more software for Mac, such as Cuadro or Resize Now, which might be related to SuperGIF.