Is anyone aware of a way to build (and ideally test) for macOS without actually owning any macOS hardware? The Linux version uses Electron and the only native

Is anyone aware of a way to build (and ideally test) for macOS without actually owning any macOS hardware? The Linux version uses Electron and the only native code is a tiny Steam integration library that only uses C++11 functions, so it might be possible to port to macOS without too much difficulty. Or maybe I should just find a cheap Mac Mini… Edit to add: in case it’s not obvious, the browser version is the same, minus Steam integration (friend leaderboards, Steam Cloud).