Apple is worried enough about supply shortages that it reported about $11.1 billion in inventory, which is almost double the $5.7 billion it reported last September.

Apple is bracing for a tough September quarter, with growing supply pressures affecting its most important products. Here are the details.

Apple is worried enough about supply shortages that it reported about $11.1 billion in inventory, which is almost double the $5.7 billion it reported last September.