I applied online (Apple website) in early March and on April 1 I was notified via email that I had been selected for the hiring event. All the Houston-area candidates were invited to a Marriott in the Woodlands in late April to attend a group panel/interview and presentations by Apple, and then of those roughly half were chosen to return for two back-to-back personal interviews the following day.
The "hiring event" was broken into an afternoon and morning group, with 30 candidates total. After Apple gave some presentations about the company we all went around the room and introduced ourselves, saying our name and where we were from, why we wanted to work for Apple, what our major was and why we picked it, and a fun fact about ourselves. (Make sure you have a "fun fact" that promotes some of your skills or creativity! Some of the people in my group just said that they had 6 names or something... not helpful.)
Then they played a movie promoting Apple and giving statistics and testimonies about how great the company is. (Pay attention to the statistics and have a few key phrases you hear in mind... they will ask after the movie is over what struck you!)
The third part of Day 1 was the group project and presentation, which consisted of us splitting into 3 groups, who each had a different real-life store problem to brainstorm and solve together. We then presented our ideas to the group.
If selected for the next round, the candidates were asked to return the next day or the day after that to do personal interviews. The format was two back-to-back 30 minute interviews, each with 2 Apple reps interviewing one candidate. The questions were behavioral (but a little more creative than the typical behavioral questions.) It was very relaxed and they genuinely want to get to know you - honest answers that give them a real picture of your personality are better than rehearsed stock answers that praise Apple (although it's always good to show excitement and admiration of the company!)
The finals (which I was not selected for) require a video project and an in-store exercise and tour - presumably at the store you applied for.
I did not make it this far, but I have heard there is also a background check and drug test, but not until your first week of work.
The whole process was a great experience - a fun time that went by very quickly. Apple did not keep its candidates waiting throughout the interview process - from start to finish (including the finals) it took less than a week. Best advice: show A LOT of enthusiasm for Apple and its products, and a HIGH ENERGY level, especially during the group hiring event when it's important to get noticed. I would also recommend brushing up on some background on Apple as a company, and their products, if you are not already an expert. Good Luck!