WWDC Prelude. Apple Announces Mac Pro. Leopard Preview. Apple Unveils New Mac Pro Featuring Quad 64-bit Xeon processors. Apple Previews Mac OS X 10.5, Launches Mac Pro, Intel Xserve. Mac OS X 10.5 “Leopard” Screen Shots. Mac Pro, Mac OS X Virtual Desktops Announced at WWDC. WWDC Predictions. The WWDC aftermath.