Updates brought Intel Core i5 and i7 processors and introduced Intel's Thunderbolt. Called the 'unibody' model because its case was machined from a single piece of aluminum, it had a thinner flush display, a redesigned trackpad whose entire surface consisted of a single clickable button, and a redesigned keyboard. The second-generation model debuted in October 2008 in 13- and 15-inch variants, with a 17-inch variant added in January 2009. Later revisions added Intel Core 2 Duo processors and LED-backlit displays.

The 15-inch model was introduced in January 2006 the 17-inch model in April. The first-generation MacBook Pro used the design of the PowerBook G4, but replaced the PowerPC G4 chips with Intel Core processors, added a webcam, and introduced the MagSafe power connector. It is currently sold with 13-inch, 14-inch, and 16-inch screens, all using variants of the Apple-designed M1 and M2 system on a chip. Introduced in January 2006, it is the higher-end model of the MacBook family, sitting above the consumer-focused MacBook Air. It has up to a 28-core Xeon-W processor, eight PCIe slots, AMD Radeon Pro Vega GPUs, and replaces most data ports with USB-C and Thunderbolt 3.The MacBook Pro is a line of Macintosh notebook computers by Apple Inc. In December 2019, the third-generation Mac Pro returned to a tower form factor reminiscent of the first-generation model, but with larger air cooling holes.

Limitations of the cylindrical design prevented Apple from upgrading the second-generation Mac Pro with more powerful hardware. Reviews initially were generally positive, with caveats. Thunderbolt 2 ports brought updated wired connectivity and support for six Thunderbolt Displays. It had up to a 12-core Xeon E5 processor, dual AMD FirePro D series GPUs, PCIe-based flash storage, and an HDMI port. Apple said it offered twice the overall performance of the first generation while taking up less than one-eighth the volume. In December 2013, Apple released the second-generation Mac Pro with a cylindrical design. Revisions in 20 revisions had Nehalem/ Westmere architecture Intel Xeon processors. It was replaced on April 4, 2007, by a dual quad-core Xeon Clovertown model, then on January 8, 2008, by a dual quad-core Xeon Harpertown model. Introduced in August 2006, the first-generation Mac Pro had two dual-core Xeon Woodcrest processors and a rectangular tower case carried over from the Power Mac G5. Intel Xeon-W Cascade Lake (current release) Decem 2 years ago ( ) (third generation).Decem 8 years ago ( ) (second generation).Aug 16 years ago ( ) (first generation).

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