I was expedited through the process as Apple acquired the company I was going to work for. Apple flew me out for one day of on-site interviews, and I had three 2-1 interviews. There was no effort to get to know me in any of them. Each interview was an hour spent entirely on technical questions covering algorithms and system design.
The first two interviews were not great, but not terrible. I asked a lot of clarifying questions, which seemed to annoy the interviewers more than anything. Weird.
The worst interview I've ever had was the 3rd one, with the two team leads. One of them wrote up a problem on the whiteboard, and then spent the rest of the interview looking bored out of his mind at his phone. His problem was very vague and incomplete as he first asked it, and when I asked questions about it he got frustrated and talked down to me. He would occasionally glance up at my progress (it wasn't a hard problem once the details were worked out) and make a snide remark about what I had written. He expected syntactically perfect whiteboard code, and threw in some expletives for an added bonus. The other interviewer would snicker whenever the first criticized my code. At the end they asked if I had any questions, but every question I asked was met with, "That's confidential." It was definitely the most unprofessional interview I've ever been a part of, and I almost walked out of it because it was clear it was wasting all of our time.
Unfortunately the misery didn't quite end there, as it took Apple three full months (and 13 reminder emails) to reimburse me for the costs I had to pay for cab rides and per diem expenses. I was also never reimbursed for a flight I had to cancel because of the interview timing, but at this point I'm just tired of dealing with them. If possible, try to get Apple to pay up front for as much stuff as possible, because the reimbursement process is a nightmare. My (senior) recruiter had no idea where to even begin with it, which I still don't quite understand.