A few years ago 'Woz', as he's affectionately known, helped two parents surprise their daughter with a brand new iMac, and a video of the event has appeared on video sharing hub YouTube.
The video was posted by someone with the moniker Buster Doggboye and shows Woz and his wife arriving at the house of one of the world's biggest Apple fans Emma and her family, delivering them a shiny new iMac.
"A few years ago, Steve and Janet Wozniak came to town to help us have a little fun with our kid Emma," the video's description reads.
"Emma’s dad met them around the back of the block to give them Emma’s new iMac, and then they drove back around and rang the doorbell to deliver it … and shocked the heck out of Emma and her sister and friends. Little sister Elizabeth got the iPod Touch as a “one more thing,” and Janet shot the video.
"Steve’s known to be quite the practical joker, and it was very kind of him and Janet to spend the time to do this … and make a great memory for all of us."
Emma's dad explains that he posted the video with Woz's permission and that it seemed like " having your lightbulbs delivered by Thomas Edison."
Having delivered the iMac to a delirious Emma, he was kind enough not to leave Elizabeth out -- she got an iPod Touch.
Woz explained to Gizmodo: "An email-only acquaintance, Peter Fraser, came up with the idea and asked if I'd do it. I met him around the block to get the computer from him. After a short wait I drove to his house and surprised his daughter. But I had to keep driving to Tahoe that evening."
Woz also told the website that when he meets people during personal appearances, he sometimes take the phone numbers of their loved ones and then calls them up, pretending to be Apple support.
"It's like a satisfaction survey," he said.
"I either give my name early on or later and I ask the questions straight-faced, like I really do it for Apple."
'Woz' designed both the Apple I and Apple II computers himself in the late 1970s and co-founded the company with Steve Jobs, but he left in 1987.
Check the video out below.