OSX Comic Book Viewers
I’ve only found two comic book viewers — apps that will display compressed, scanned comic books — for OSX:
Jomic is large, slow, and Java-based [which you should have guessed from the prior description]. It doesn’t support gradiated image zoom (that I could find), so you can only view images at either full-size or fit-to-window, which is bad when you’re trying to read comic books on a smaller laptop screen.
The only reason to get Jomic is because its rival, CB Viewer, hasn’t seen an update in a few months. I’m not sure if development has ceased, or the author is just busy. Otherwise, CB Viewer is fast, small, and handles gradiated image zoom quite well.