How long after Apple's second interview?

It usually takes about 2 days. No matter which round of interview, the interview results will generally come out within 2 days (including the interview day). After this round of interviews, Apple HR will take the initiative to contact you. After this time, there is basically no chance. Of course, there are many applicants. Recruiters will use you as a spare tire to see if there is anything better behind. If you can't find something better in a while, I'll contact you again.