Compatibility: OS X 10.7 or later 64-bit

Synalyze It! Pro is a simple-to-use hex editor which will allow you to easily edit and analyze binary files of any size. It features enhanced support for many character encodings and enables you to interactively define "grammars" for various file formats to speed up analysis and reduce manual decoding of files. Incremental search for strings and numbers, printing and other features make it a quite powerful tool.

Homepage:  https://www.synalysis.net