Now all you need to do is open the app to have your retro fun. Drag the Macintosh.js.app file to your Applications folder. Doing that downloads a standalone application to your Mac’s Downloads folder. Mac users want to click the “Standalone” icon under the macOS heading.
Nope, just scroll down the page until you see this: You can even run this old Mac on a Windows or Linux machine! When you point your browser to GitHub, don’t panic! You’ll see a directory of code listings that might cause you to think this is going to require a graduate level degree in computer science. Under the multicolor Apple icon, you’ll be able to find a bunch of the common features of Mac OS 8 including the Control Panels, Jigsaw Puzzle, and even the 1991 version of Stickies! How to Download and Install
What surprised me is how fast this emulated Mac is much faster than any “real” Mac of the time.
