Over the past couple of decades, we have seen a lot of transformation in Apple’s macOS versions. While the Cupertino tech giant is busy releasing the betas of its latest macOS version, the Big Sur, a developer has been able to convert one of the earliest versions of the macOS into a 250MB app for Windows, Linux, and macOS.

Now, the macintosh.js app is essentially an Electron app which means that the developer wrote the entire app in JavaScript. The app uses a virtual machine to emulate the experience of the Apple computer from 1991. The developer was also able to bring some of the classic apps and games, courtesy of a MacWorld demo CD from 1997 which included all the additionals.

Nonetheless, this “macintosh.js” app makes us realize how far we have come from those early days of computing, much like the 98.css library.