So i'm trying to charge my iphone with my macbook, and not having much luck. It's not even recognizing it, so i'm unable to sync or add songs through itunes. I thought it did briefly yesterday, but can't recall. The iphone is currently almost dead at 3%...does that have something to do with it? I was thinking the macbook would just start charging it and recognize it right away. Any help would be hugely appreciated.