Under pressure from politicians to create manufacturing jobs at home, Apple was looking to score political points. The decision caused production headaches though.
The Mac Pro's glossy exterior and chrome beveled edges meant Apple had to make its own manufacturing tools and then train people to run those machines in an assembly plant. This slowed production and constrained Apple's ability to make enough computers to meet demand.
Three years on, the Mac Pro is ripe for an upgrade with its chips and connector ports lagging rival products. Because of the earlier challenges, some Apple engineers have raised the possibility of moving production back to Asia, where it's cheaper and manufacturers have the required skills for ambitious products, according to a person familiar with those internal discussions.
LOL: http://www.theverge.com/2016/12/21/14037030/apple-made-in-america-failure
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