John Ternus faces a turbulent start to his tenure as Apple CEO, including massive RAM pricing spikes that will impact the fall iPhone launch. With continued pressure to manufacture in the U.S, supply chain changes could be on the way. The arrival of John Ternus as Apple CEO in September will be a big event for Apple, but it will also include some tough early choices. Some that will affect how Apple's massive supply chain operates in the future. At present, Apple is dealing with the industry-wide problem of memory pricing , with RAM skyrocketing in cost and affecting the price of electronics in general. So far, Apple has managed to insulate itself from the problem through strategic contracts with suppliers, but it won't last forever . According to executives, supply chain experts, and analysts speaking to the Financial Times , Ternus will have some major decisions shortly after the CEO transition.…