The 2.7.3 version of ComicZipper for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application is included in System Tools. This free Mac application was originally created by Ardalan Samimi. We recommend checking the downloaded files with any free antivirus.
From the developer:
ComicZipper offers a quick and easy way to create comic book archives. With Comic Zipper you no longer need to zip and rename your digital public domain comic books manually. You can compress your folders (or repackage .cbr archives) into comic book archives for your reading pleasure with a simple drag and drop.
You may want to check out more software for Mac, such as NoLimits Pack Extractor, Secret Missions - Mata Hari and the Kaiser's Submarines or Split n Join Demo, which might be related to ComicZipper.