Longtime Apple human interface director Greg Christie, who has been with the iPhone maker since 1996, is said to be planning an exit after his relationship with recently-elevated senior vice president of design Jony Ive allegedly turned sour. Christie is currently responsible for software design across each of Apple’s product lines and was a key member of the group that created the first-gen iPhone. He reports to Apple software chief Craig Federighi, rather than nominal design leader Jony Ive, who has until now chosen to eschew day-to-day management of the software design team in favor of providing high-level direction. 


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