Unlock stock picks and a broker-level newsfeed that powers Wall Street. In This Article: (Bloomberg) -- Apple Inc. is undergoing a rare shake-up of its executive ranks, aiming to get its artificial intelligence efforts back on track after months of delays and stumbles, according to people familiar with the situation. Most Read from Bloomberg New York Subway Ditches MetroCard After 32 Years for Tap-And-Go Despite Cost-Cutting Moves, Trump Plans to Remake DC in His Style Amtrak CEO Departs Ami...