ANTLRWorks is a free grammar development environment designed to make ANTLR v3 grammars more accessible to the average programmer.
ANTLRWorks offers intuitive grammar navigation and refactoring tools, such as an interpreter for rapid prototyping, a language-agnostic debugger for isolating grammar errors, as well as a grammar-aware editor.
Detailed instructions on how use the ANTLRWorks utility on your Mac are available HERE.
Being developed using Java, ANTLRWorks is a cross-platform application that can be used on any operating system that comes with Java support (e.g. Mac OS X, Windows, Linux).
- TJP updated to compile with ANTLR 3.3.