Matt Groening, the original artist and creator of The Simpsons was working for Apple designing Mac brochures and posters while creating The Simpsons characters, rare documents reveal. We unearth some of Groening's work for Apple in 1989.Related StoriesMan arrested for child porn in cloud; viewing on iPadNew Mac Pro 'could offer 8TB SSD', claims report, 'launch in April' states anotherApple knocks £300 off build-to-order 768GB SS