The unidentified diner lashed out after walking into a service area at the restaurant in Santa Ana, California, prompting the worker to tell her that she was not to be in there.
The incident began around 11 p.m. on October 27, after the woman went through the drive-thru of the McDonald's restaurant in the 1500 block of North Bristol Street in Santa Ana, according to the Santa Ana Police Department.
"When the store manager said she could not be in the building, the suspect became combative", a police official said in a statement.
Police said they hope to find the man, but clarified that he is not in trouble, according to KTLA-TV.
Though another employee is seen trying to separate the pair, it's not until a man believed to be with the ketchup lover intervenes that the brawl is called to an end.
Santa Ana Police Department have issued an appeal for information on the woman's identity.
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"Obviously, we take these things seriously", he said.
"There's no reason to physically assault someone because you didn't get enough ketchup".
The suspect was described as a Hispanic woman with brown hair, approx.
The video released by police this week shows a woman wearing a light pink T-shirt and dark grey trousers choking and slamming the manager's head against a soda machine in kitchen area.
"Our biggest priority is always the safety and well-being of our employees and customers at our restaurants", Kaplan added.