You do not need an ACMT to work at Apple. A large percentage of their Genius Bar staff have no prior IT experience what so ever and are built from the ground up. What you need is a decent resume that will get their attention and then an awareness to the few times a year when they're hiring.
Their hiring policy is more like the modern form of retail that you would find in a company like Coles/Woolworths, or McDonalds. They like to work with people they are familiar with and hire from within even if the bigger roles such as internships are listed on their retail jobs website. Actually if you have previous work experience with Coles/Woolworths/McDonalds they generally regard it well.
I've gotten the interview. I never made it through the full process to working retail. 6 of one half a dozen of the other. I don't think I'm as interested in working in the retail side of Apple anymore. I'm just not as enthusiastic about Apple as I once was.