Some issues here:
It doesn't allow disk editing or viewing, it only allows this with files... Still useful though. A block editor would be real nice for those of us that get into that low-level stuff.
The program attempts to check for updates, but doesn't check for an actual internet connection, so when I launched this, it froze up for about 4 minutes trying to work with something that wasn't there.
It also displays a Network volume (inconsistently, I might add) even when there is no Network connection. For yucks I attempted to read one of the files it showed, and it permanent locked-up the program (cmd-opt-esc required). If there is no network, this should avoid accessing system files that will cause issues if it isn't really present.

The program does two things annoying on install... it forces you to install in Applications only, and it doesn't set the proper permissions. Typically one would put this in "Applications/Utilities" and unless it hooks into the system in some bizarre way, should be an app that can be placed anywhere. And having to manually change the permissions so you can delete read-me files that are in a non-native language, is silly.

This looks nice (better than several other hex editors), though could have a slightly better assembled look.

Hope to see it updated to address these issues. It beats the "bang-it-with-sledge" hex editor I'm using now.