Try out BasiliskII.js in your browser right here which macintosh.js is based of.
macintosh.js-Mac-OS-X-darwin-x64-1.0.6.zip (248.4 MiB / 260.47 MB)
macintosh.js v1.0.6 for Mac OS X / Zipped
macintosh.js-win32-x64-1.0.6.zip (247.34 MiB / 259.35 MB)
macintosh.js v1.0.6 for Windows / Zipped
Architecture: Intel x64
For Windows and Intel Mac OS X