There were two initial phone screens.
The first one is purely technical and is moderately difficult. The second one is technical and behavioral, but it is a tough technical interview.
Difficult
The following metrics were computed from 126 interview experiences for the Apple Hardware Engineer role in United States.
Apple's interview process for their Hardware Engineer roles in the United States is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for Apple's Hardware Engineer interview process in United States.