https://www.techradar.com/news/apples-self-driving-car-is-the-latest-to-get-into-a-road-accident

We've seen crashes involving self-driving cars from Waymo, Uber and Tesla, but not Apple – until now. As per a report filed with the California Department of Motor Vehicles, one of Apple's test vehicles was involved in a low speed incident on August 24.

Apparently, the autonomous Apple car was attempting to merge onto an expressway and traveling at only 1 mph when it was rear-ended by a Nissan Leaf, the report says. In other words, the human driver in the Nissan was probably expecting the Apple car (a Lexus) to drive on or just wasn't paying attention to what was ahead.