Paying a monthly subscription just to emulate a 1970s green-screen terminal is absurd. So I built my own. Meet X3270: A free, native macOS TN3270/TN3270E emulator. Built from scratch in pure C++ and Cocoa. No Java. No X11. No Electron bloat. It has implicit TLS 1.2+ via OpenSSL and full ISPF Query Reply support. Free and open-source forever. Read the architecture breakdown on my blog: https://www.dockerr.blog/blog/modern-free-TN3270-terminal-client-for-mac-free #cpp #opensource #mainframe #zOS #macOS #COBOL #FOSS #softwareengineering