Mac OS Developer Tools
From Bare Bones Software, makers of the legendary BBEdit, comes TextWrangler.
This award-winning application presents a clean, intelligent interface to a rich set of features for high performance text and code editing, searching, and transformation.
TextWrangler's best-of-class features include "grep" (regular-expression) pattern matching, search and replace across multiple files, function navigation and syntax coloring for numerous source code languages, code folding, FTP and SFTP open and save, AppleScript, Mac OS X Unix scripting support, and much more.
This version is compatible with macOS 10.9.5 through 10.12.6. Complete details are available in the TextWrangler change notes, located on the support page at https://www.barebones.com/support/textwrangler/.