In 1990, Apple produced a presentation for demonstrating Apple's A/UX 2.0 operating system. The OS allowed Mac Users to use Mac OS System 7 and Unix in the same environment. It didn't come cheap though, the first version launched in 1988 came in at a whopping $8,597!

YouTuber, Mr. Fahrenheit, has uploaded this presentation for all to see here:

Apple abandoned the A/UX platform completely by 1996, but it didn't abandon Unix, which would be the basis of its OS X operating system launched in 1999.