The two versions of Mac OS are System 6 (version 6.0.8) and System 7 (version 7.0.1). The nifty thing about this development, however, is that you can run them within your web browser previously, it took a downloadable emulator that could be run as a standalone program. Earlier this month, Internet Archive added yet another software collection, this time a plethora of classic Mac OS emulators and programs.
