Developer Nick Lee has figured out a way, with the help of the experimental Mini vMac emulator, to put the 20-year-old System 7.5.5 onto an Apple Watch, thanks to the beta of watchOS 2.0, which allows native third-party apps. Remarkably, the low-power S1 system-on-chip that Apple uses for the Watch is powerful enough to run the emulator and 1996-era system at a slow but usable speed, showing off the improvements in technology.
