The hex editor part of Synalyze It! is now more or less complete - just a few things are missing.
So in the next weeks I'll focus more on the grammar and what can be expressed with it. Most importantly the length of string and binary structure elements must be able to depend on the value of number structure elements.
The new offset structure element type allows to display related contents that are spread over a file to be displayed next to each other.
Yes, I know... how to create a grammar is not really self-explaining. More documentation will come... :)
Not to forget: Thanks for all the feedback I got already! It helps to implement what's really needed and to create an application that makes Windows users jealous. :-D
P.S.: I found another (free) hex editor with additional features for the Mac: PeekIt.