Simple Comic
There are many comic readers for the Mac, but Simple Comic from Dancing Tortoise is a cut above most. Not only is it free, but it makes comic reading easy and comfortable. The program’s strength lies in the simple interface and how simple it is to move among pages.
After opening the app, you have the option to load two pages or center it. You can browse pages using its scrollbar. Simple Comic will display thumbnails. This is a very convenient feature that will save you time from going back and forth.