"Apple made the previous Mac Pro in Austin, Texas, beginning in 2013. But with the new Mac Pro unveiled this month being made in China, Apple is "shifting abroad production of what had been its only major device assembled in the US as trade tensions escalate between the Trump administration and Beijing," The Wall Street Journal reported today."
https://arstechnica.com/information-technology/2019/06/apple...
That said, this all feels somewhat self-inflicted. One wonders if the tariffs on imports from China hadn't been put in place, perhaps Apple wouldn't have wanted to move production of this model out of the US.