In June, Apple announced the iMac Pro, a powerful machine aimed at creative professionals. Now the Pro has finally hit the market, and not only is it Apple's most powerful computer, it's also its most expensive. To get the Pro with its 27-inch Retina display, 8-core Intel Xeon processor, 32GB of RAM and 1TB of storage, you'll have to invest a cool €5,599. That's just for starters. You can add extras, from 18 core processors to a 4TB SSD that will bump the price even higher – almost €15,500. This is a serious machine for serious work.