After I submitted my resume, one of the recruiters contacted me within 24 hours and quickly set up a phone screen interview with the hiring team. The interviewer asked me some normal questions, then brought me in for an on-site interview.

I met about 5 senior engineers. Almost all questions they asked related to my past GPU experience, and they were seriously taking notes. "I can't tell you" was the only answer I got from them when I asked some reasonable questions.

After talking to my internal resource, I learned what Apple is doing. Basically, Apple hired a huge number of temporary hunting agents to find experienced people, in my case, with experience in GPU. The purpose of this is not for hiring, but for their own knowledge. If you are from Intel, Nvidia, or some other cutting-edge GPU company and are interviewed by Apple's GPU org, be very careful when answering their questions, such as:

• "Can you tell me how you verify your block?"
• "What is the most interesting bug you have closed?"

Those are reasonable questions, but just make sure not to go too deep into your current project(s).

Can you tell me how you verify your block?