Answer:
The answer is the Apple Macintosh
Step-by-step explanation:
The Apple Macintosh PC was the first widely sold and most popular PC with a GUI. It was based on its earlier predecessor called the Apple Lisa which was later killed by the Apple Macintosh OS. Prior to the Apple Macintosh was the Xerox PARC which was the first PC to support an OS that was based on GUI. However, the Xerox was not a popular commercial product and was intended for University research only