I'd mostly agree, but with them specifically calling out "not anything formal" as part of the expectations for interview attire wouldn't be the time I'd want to be riding the line of "is this too close to formal". This isn't a job at a tailor or stylist. You're not being tested on your understanding of the roles of various garments in different levels of fashion over time.
Presumably OP had seen/visited an Apple Store before and knew what employees wore there, so it's not a mystery what the uniform is, and therefore what is probably meant by "don't wear anything formal". It's not some kind of gotcha.
Presumably OP had seen/visited an Apple Store before and knew what employees wore there, so it's not a mystery what the uniform is, and therefore what is probably meant by "don't wear anything formal". It's not some kind of gotcha.