This is really nice! "Waterfall-style" doesn't mean anything, though. What are you actually referring to?

The lack of a simple, efficient image browser on Mac (or Windows, for that matter) has been a daily annoyance. This thing browses efficiently, lets you move files, and doesn't try to build a "database" that you have to maintain. Good job!

Are there build instructions anywhere? I don't know how to resolve the missing frameworks. I tried cloning the project recursively, but this didn't add anything.