The apple products are usually made in California but are assembled in china. This allows the company to save money on the production. California products ensure that the quality is ensured and that all components are designed by the country and properly quality checked. However, they are then shipped to china to assemble. This is because the assembling costs are much lower in china than in California.
The human power costs less as well as the expertise needed. This allows apple to save huge bucks in the creation of the product, which increases the profit margin by millions. Many other companies adopt a similar strategy as well.