Wozniak, who quit Apple in 1987 after 12 years, said a scene depicted in an clip of the movie "iJOBS," premiering at the Sundance Film Festival later in the day, had no basis in reality.
"Not close... we never had such interaction and roles... I'm not even sure what it's getting at... personalities are very wrong although mine is closer," he told the tech blog Gizmodo.
"The ideas of computers affecting society did not come from Jobs. They inspired me and were widely spoken at the Homebrew Computer Club," he added, referring to a hobby group to which they belonged.
The film, one of two about the iconic Apple founder who died in 2011, is due for release in the United States in April. Another movie is being made from the biography of Jobs by Walter Isaacson, published shortly after his death.
"Steve came back from Oregon and came to a club meeting and didn't start talking about this great social impact," said Wozniak, referring to the period in the 1970s before Silicon Valley took off.
"His idea was to make a $20 PC board and sell it for $40 to help people at the club build the computer I'd given away. Steve came from selling surplus parts at HalTed -- he always saw a way to make a quick buck off my designs (this was the 5th time).
"The lofty talk came much further down the line... I never looked like a professional. We were both kids," said the famously geek-casual-looking Wozniak.
But he stressed the inaccuracies in one clip did not necessarily mean the film was bad.
"The movie should be very popular and I hope it's entertaining. It may be very correct, as well. This is only one clip. But you'll see the direction they are slanting the movie in, just by the dialogue style of this script," he said.
"Our relationship was so different than what was portrayed. I'm embarrassed but if the movie is fun and entertaining, all the better. Anyone who reads my book 'iWoz' can get a clearer picture."