Wikipedia:
Star Trek was to be a version of the Macintosh operating system running as a GUI on Intel-compatible x86 personal computers on top of Novell’s next in-development version of the DR DOS operating system in a similar fashion as Microsoft Windows 3.x would run on top of DOS (including DR DOS). (At that time, the Mac OS ran only on Apple’s own computers based on the Motorola 68000 architecture.) The project was named after the Star Trek science fiction franchise with the slogan “To boldly go where no Mac has gone before.”
While work on the project was cancelled after just a year or so, but by the end of it, System 7.1 could be booted on an Intel 486 PC, albeit with no apps.
As cool as this project is to read about, when thought about in the context of what would happen with NeXT just a few years later, it’s pretty mind-blowing. What if Apple and Novell had succeeded in this?