Affectionately known as the "Cheese Grater" due to its perforated front mesh grill, this era featured highly modular 3.5-inch hard drive bays and PCIe expansion slots.
- Mac Pro (First Generation - Late 2006): Model Identifier
MacPro1,1. Dual Dual-Core Intel Xeon processors (64-bit architecture with a 32-bit EFI firmware limitation). - Mac Pro (Early 2007): Model Identifier
MacPro2,1. BTO (Build-to-Order) configuration bumping the system to 8-cores using dual Quad-Core Intel Xeon processors. - Mac Pro (Early 2008): Model Identifier
MacPro3,1. Introduced a true 64-bit EFI boot environment, faster PCI Express 2.0 graphics slots, and standard Quad-Core/8-Core Intel Xeon Harpertown architectures. - Mac Pro (Early 2009): Model Identifier
MacPro4,1. Shifted to Intel Xeon Nehalem processor microarchitecture using a revolutionary removable processor tray system and high-speed DDR3 ECC memory. - Mac Pro (Mid 2010): Model Identifier
MacPro5,1. Upgraded to Intel Xeon Westmere processors, offering up to 12-core configurations natively from the factory. - Mac Pro (Mid 2012): Model Identifier
MacPro5,1(Revision). A minor spec-bump to the 2010 model using slightly faster clock-speed Westmere processors; it was the final iteration of the classic modular architecture.
