Developer Nick Lee this evening has shared a video showing how he managed to hack an Apple Watch to run Macintosh OS, System 7.5.5. For those counting, that was released 19 years ago on September 27, 1996. The Apple Watch was released April 24, 2015. That’s a pretty impressive feat by Lee (via MacRumors).

Lee was able to accomplish this with an Apple Watch running watchOS 2 and the Mini vMac Macintosh Emulator. The mini vMac Macintosh Emulator is designed to allow more modern devices run software that was designed for early Macintosh computers. Macintosh OS, System 7.5.5 was designed to run on a PowerPC Mac at the time of release.

You can view the video of System 7.5.5 running on Apple Watch above. Below is a comparison of the sizes of two devices: the system on which System 7.5.5 was designed to run and Apple Watch.

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