Well, Mac OS 7 and earlier at the very least. With the ever slow advancement of graphing calculators from Texas Instruments, the quest to see what we can jam into limited hardware is ever present in the active calculator programming community.
From Jim Bauwens, we now get to see a complete port of vMini Mac running the Mac OS operating system for the Ti-Nspire series. The port comes complete with all the time-wasting productive applications you’d expect from a Macintosh Plus.
Interestingly enough, there are also Nspire emulators for iOS… and iOS emulators for Mac OS X! So therefore you could operate your a Mac on an Nspire on an iPad on a Mac! Genius!
Source:
Ti-Planet.org
Damn, this could have been fun back in high school :D.
you mean UNIX now on calculators xD