Slack developer Felix Rieseberg has transformed Mac OS 8 into an app that can be installed on your Mac or PC. After converting Windows 95 to an app back in 2018, Rieseberg decided to turn the entire 1991 Macintosh Quadra with Mac OS 8.1 into a single Electron app. It even includes a number of apps and games, thanks to the old 1997 MacWorld demo CD. You can install the app on MacOS, Windows , and Linux.
The macintosh.js app is written entirely in JavaScript and uses a virtual machine to emulate the Quadra 900 Macintosh with the Apple Motorola CPU used prior to its transition to IBM PowerPC chips. Rieseberg managed to get classic games like Duke Nukem 3D, Civilization II, Dungeons & Dragons, Namely, Oregon Trail, Alley 19 Bowling, and Damage Incorporated Racing. There's even a bunch of pre-installed apps and trials, including Photoshop 3, Premiere 4, Illustrator 5.5, StuffIt Expander, and the Apple Web Page Construction Kit.