It’s true: Not every Apple offering is a hit. Apple aced its Ping social networking service for music, which debuted in iTunes 10 in 2010, on Sept. 30, 2012. The service had some supporters, but its lack of integration with more popular social sites and its sketchy recommendation engine didn’t help. Apple also ditched its $99-a-year MobileMe sync and storage service this year, urging customers to switch to iCloud from MobileMe, which got off to a rough start with outages and poor synching. Apple’s iWork sharing service suffered the same fate, with users urged to shift to iCloud.