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Sublime is a massive improvement in my opinion, and cross platform. It's not free** but you can use a personal license at work and on multiple machines. It's one of the few text editors with a plug-in system that can reliably open 100mb+ files and auto reload on file updates (without crashing constantly).

https://www.sublimetext.com/

** it's sort of free, the trial period is unlimited. It just gives "activate me" popups every dozen file saves or something.

Thanks! I’ll check it out.

https://www.geany.org/download/releases/ has a Mac installer. It's what I used to replace notepad++ when I moved from windows to Linux.

TextAdept is a cross platform, minimal, fast, and extensible text editor that might be a good candidate.

Thanks! I’ll check it out.