There are many alternatives to Kate for Mac if you are looking for a replacement. The best Mac alternative is Visual Studio Code, which is free. If that doesn't suit you, our users have ranked more than 100 alternatives to Kate and loads of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Kate are Atom (Free, Open Source), Sublime Text (Free Personal), Vim (Free, Open Source) and Geany (Free, Open Source).
VS Code is more than just a code editor, it provides the tools and extensions to compile, debug, compare, refactor, and even manage code repositories all within a highly-customised development environment.
GNU nano is a small and friendly text editor. Besides basic text editing, nano offers many extra features like an interactive search and replace, go to line and column number, auto-indentation, feature toggles, internationalization support, and filename tab completion.
Neovim is a project that seeks to aggressively refactor Vim in order to: Simplify maintenance and encourage contributions. Split the work between multiple developers. Enable the implementation of new/modern user interfaces without any modifications to the core source.