On June 6, 2006, Apple announced the first Mac Pro at its Worldwide Developers Conference, introducing a desktop workstation that used Intel Xeon processors and replaced the Power Mac G5. The announcement marked Apple’s transition to Intel architecture for its desktop computers, a shift that began earlier in 2006 with the iMac, Mac Mini and MacBook. The new Mac Pro retained the same chassis design as the G5 while adopting x86 processors. The initial model was equipped with two dual‑core Intel Xeon 5160 processors running up to 3.0 GHz, each with 4 MB shared L2 cache and a 1.33 GHz front‑side bus. Graphics options included the Nvidia GeForce 7300 GT with 256 MB GDDR3, with higher‑performance ATI Radeon X1900 XT and Nvidia Quadro FX 4500 available, each with 512 MB video memory. Memory was 1 GB of DDR2‑667, expandable to 16 GB. Storage began at 250 GB and could be expanded to 2 TB across four bays. The system included a 16× SuperDrive with double‑layer support, multiple USB 2.0 ports, optional Wi‑Fi 4, a 56k USB modem, Bluetooth 2.0+EDR, and FireWire 800 and 400 ports. It offered four PCIe 1.0 slots, one double‑wide slot for graphics cards, and was compatible with Mac OS X Tiger at launch, later supported through OS X Snow Leopard. Apple offered three processor configurations at launch: the top model with two 3.0 GHz Xeon 5160 CPUs, a 2.66 GHz Xeon 5150 x2 configuration, and a 2.0 GHz Xeon 5130 x2 configuration. The online configurator reportedly provided more than 4.9 million possible configurations. The base price for the Xeon 5150 x2 model was $2,499, including a Mighty Mouse and Apple Keyboard. Apple ceased production of the Intel‑based Mac Pro in 2023 with the introduction of the M2 Ultra‑powered model and announced in March 2024 that no further revisions would be released, effectively ending the upgradeable desktop workstation line. The Mac Studio now serves as Apple’s primary high‑performance desktop offering.