Our software library provides a free download of ANTLRWorks 2.1 for Mac. Our built-in antivirus scanned this Mac download and rated it as 100% safe. This free Mac application is a product of antlr. The software lies within Developer Tools, more precisely IDE. The latest installer that can be downloaded is 25.8 MB in size.
From the developer:
ANTLRWorks is a novel grammar development environment for ANTLR v3 grammars written by Jean Bovet (with suggested use cases from Terence Parr). It combines an excellent grammar-aware editor with an interpreter for rapid prototyping and a language-agnostic debugger for isolating grammar errors.
You may want to check out more software for Mac, such as wxFormBuilder, TopCoder UML Tool or Jaxe, which might be similar to ANTLRWorks.