20 years ago today, Steve Jobs took to the Apple WWDC stage to unveil the first-ever Mac Pro desktop computer. As well as marking the beginning of a whole new Mac line, this was the first Apple workstation desktop to transition from PowerPC to Intel x86. Apple had already introduced Intel-powered versions of its iMac, Mac Mini, and MacBook at the start of 2006; now it was replacing the mighty PowerMac G5 tower.