MacSurf brings modern web browsing to 25-year-old Mac OS 9 PowerPC machines; developer builds native CSS3, ES5 JavaScript and TLS 1.3 HTTPS browser using 1999-era CodeWarrior tools

MacSurf brings modern web browsing to 25-year-old Mac OS 9 PowerPC machines; developer builds native CSS3, ES5 JavaScript and TLS 1.3 HTTPS browser using 1999-era CodeWarrior tools—first release May 2026, now at v1.3.1.

GitHub - mplsllc/macsurf: A modern web browser for Classic Mac OS 9 PowerPC. Real CSS3, ES5 JavaScript, native HTTPS — built with CodeWarrior on the Carbon API.

The modern web, on a 25-year-old Mac. MacSurf is a web browser for Classic Mac OS 9 PowerPC. CSS3, ES5 JavaScript, PNGs with alpha, running on a G3 iMac. WarningMacSurf is early alpha. It runs, it renders, it talks TLS 1.2 natively to real HTTPS sites (as of May 2026), and it executes JavaScript on a 233 MHz G3. That doesn't mean it's ready for daily driving — most of the modern web still won't work in it. Heavy SPAs, modern CSS features we haven't shipped, missing form interactions, slow JS on ...