Around 2 months after I submitted my resume for Apple software engineer position, I got a call from the hiring manager. He asked me what was the good day for the interview. It took half day for meeting 5 people. It was long hour interview for me. Each interviewer spent ~ 30 minutes and asked ~ 4 questions. Each interviewer asked questions in the different areas.

The interview was easy, we talked about technical stuff in-depth: os, drivers. If they think you know something, they would ask you till they find where your knowledge ends. So be ready

6 rounds. 1 Technical Screening. Then onsite loop consisted of 4 rounds of behavioral, 2 technicals, and 1 sys design. Had an additional Hiring Manager round since I was borderline.