Snow - Classic Macintosh emulator

For some context about why a portable, user-friendly, hardware-level emulator for classic Mac systems is such a big deal, see this blog post from 2020: https://invisibleup.com/articles/30/

For game consoles, we've had emulators like Nestopia and bsnes and Dolphin and Duckstation for years.

For PCs, virtualisation systems like VMWare and VirtualBox have covered most people's needs, and recently there's been high-fidelity emulators like 86Box and MartyPC.

The C64 has VICE, the Amiga has WinUAE, even the Apple II has had high-quality emulators like KEGS and AppleWin, but the Mac has mostly been limited to high-level and approximate emulators like Basilisk II.

In compatibility, it's MUCH worse than all the others, but there's also Executor: https://en.wikipedia.org/wiki/Executor_(software) which you can use to run a Macintosh version of solitaire in your browser by having the browser emulate MS-DOS which then runs Executor/DOS: https://archive.org/details/executor

In addition to Executor/DOS, a non-released version ran on the Sun 3 workstations (they too had 680x0 processors) and Executor/NEXTSTEP ran on NeXT machines, both the 680x0 based ones and the x86 powered PCs that could run NEXTSTEP.

Executor was the least compatible because it used no intellectual property from Apple. The ROMs and system software substitutes were all written in a clean room--no disassembly of the Apple ROMs or System file.

Although Executor ostensibly has a Linux port, it's probably hard to build (I haven't tried in a couple decades) in part because to squeeze the maximum performance out of a 80386 processor, the synthetic CPU relied on gcc-specific extensions.

I know a fair amount about Executor, because I wrote the initial version of it, although all the super impressive parts (e.g., the synthetic 68k emulator and the color subsystem) were written by better programmers than I am.