It is one of only two known surviving Apple Macintosh prototypes with a working 5 ¼ inch Apple drive known as the “Twiggy” drive circa 1983. Reportedly Steve Jobs ordered all the 5 ¼ inch drive Macintoshes destroyed when he abandoned the Lisa carryover format and decided instead to go to market in 1984 with a Sony 3.5-inch disk drive.
Just as Sleeping Beauty’s parents could not destroy every spindle in the land, this Macintosh was saved by the developers of the original MacWrite word processing program. The Twiggy prototype had some measure of redemption when it was shown at the Mac@30 Anniversary Celebration in 2014, where it booted up and operated for Steve Wozniak himself.
Though the 5 ¼ inch drive lost out to the smaller drive, the Twiggy prototype had all the other revolutionary features that made the Macintosh a sensation. Remember, Macintosh was the first successful microcomputer with a GUI and a WYSIWYG environment. Set in an all-in-one case/monitor with a mouse controller, it was part of the drama of Mac development as Apple worked to turn the Lisa into something that would become the center of the computing universe.