We recently saw Flappy Bird running on a hacked Apple Watch and now software developer Nick Lee has managed to install a 20 year old Mac OS on the Apple Watch.
The video below show Macintosh OS, System 7.5.5 running on the Apple Watch using Mini vMac Macintosh emulator.
Watch this video on YouTube.
The Macintosh OS, System 7.5.5 was released back in 1996, when it was released it needed a powerful Mac to run the software, seeing it running on the Apple Watch shows just how far computers have come in the last 20 years.
Source MacRumors