Call apple and ask. I'd bet the exemption is only for stores (online as well as brick and mortar) physically located within the state. May have to go to an apple store. Betcha its hard for one organization just to keep track of fifty sales tax rates, let alone somehow track that this state is not charging tax for a weekend.
Oklahoma just has clothes and shoes exempted this weekend. To show you how screwed up our priorities are, the sale of food is taxed, but the state's leading newspaper-which funded a two billion dollar corporate empire-is not.