[salgernon]

I’m surprised nobody mentioned the Rosetta Stone that is infinitemac.org - it’s “just” compiled to JavaScript or whatever but really well done.

From their “About”: >>>Infinite Mac is a project by Mihai Parparita to make classic Mac and NeXT emulation easily accessible. It uses WebAssembly ports of Mini vMac, Basilisk II, SheepShaver, DingusPPC, and Previous to allow a broad set of System Software/Mac OS versions to run on the web.

Shortcuts to the most popular versions are available: system6.app, system7.app, kanjitalk7.app, macos8.app, and macos9.app. <<<