From 2006 to 2012, the Mac Pro from Apple stuck with the same aluminum case, first made popular by the Power Mac G5. Now, the Mac Pro returns with a completely redesigned look. Apple revisited the architecture of the Mac Pro's internal components in order to maximize performance and minimize heat. With a unified thermal core, Apple opted for a leaner, lighter, and quieter structure that was more streamlined. The unique cylinder design stands just 9.9 inches tall with a diameter of just 6.6 inches, which allows it to be a professional workstation that can actually sit on your desk.