Infinite Mac: an instant-booting Quadra in your browser

I’ve extended James Friend’s in-browser Basilisk II port to create a full-featured classic 68K Mac in your browser. You can see it in action at or


However, none of these setups replicated the true feel of using a computer in the 90s. They’re great for quickly launching a single program and playing around with it, but they don’t have any persistence, way of getting data in or out of it, or running multiple programs at once. macintosh.js comes closest to that — it packages James’s Basilisk II port with a large (~600MB) disk image and provides a way of sharing files with the host. However, it’s an Electron app, and it feels wrong to download a ~250MB binary and dedicate 1 CPU core to running something that was meant to be in a browser.

I wondered what it would take to extend the Basilisk II support to have a macintosh.js-like experience in the browser, and ideally go beyond it.

There’s countless of these, but this is definitely one of the nicer ones. It won’t be long before we move from running classic operating systems in local emulators, to just firing up a tab and booting up whatever we feel like playing around with today. I certainly won’t miss manually creating VMs or fiddling with purpose-built emulators.


  1. 2022-04-03 7:18 pm
  2. 2022-04-04 3:36 pm
    • 2022-04-06 11:48 am