Power Mac G4 (Quicksilver)
Beautiful Quicksilver brushed-aluminum design. First Power Mac to hit 1 GHz.
The Quicksilver is the Power Mac that broke 1GHz, which Apple had been waiting to say for a while. The case went from graphite and translucent plastic to brushed silvery-white polycarbonate, keeping the same chassis and the same swing-out door, and it looked considerably more grown-up and less like a toy. Reviewers said so. The PowerPC 7450 ran from 733MHz to a full gigahertz. Intel and AMD were already past 1.5 and heading for 2, so Apple spent the year arguing that megahertz was a myth and that AltiVec did more per clock on the video and audio work people actually did. The argument was fair, and it was also clearly a defensive position. Final Cut Pro, iMovie and the new iTunes were the evidence, and a SuperDrive option let buyers author DVDs at home, which was still unusual on any personal computer in 2001. It shipped with Mac OS X 10.0.4 while adoption was still ramping. Faster memory bandwidth and a quicker system bus made it tangibly better than the AGP Graphics machines, and it is the last relaxed moment for the G4 tower before Apple needed the G5 rather badly.
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Processor Deep Dive
PowerPC 7450 (G4)
MotorolaThe 7450, part of Motorola's 'Voyager' G4 family, refined the AltiVec Velocity Engine with a deeper pipeline and improved cache architecture, allowing clock speeds to finally reach and exceed 1GHz. It offered meaningfully better performance per clock than the earlier 7400 thanks to a redesigned core and larger L2 cache options. Compared to contemporary Pentium 4 and Athlon XP chips clocked well above 1.5GHz, the 7450 conceded raw clock speed but Apple argued its vector processing closed much of the real-world gap in creative applications. It represented the high-water mark of Motorola's classic G4 desktop design before further scaling challenges emerged.
Compatible Operating Systems
Mac OS X 10.0.4
Launch OS2001
Shipped as the initial factory OS on the Quicksilver Power Mac G4.
Mac OS X 10.1
Compatible2001
Rapidly adopted update that significantly improved OS X responsiveness on this hardware.
Mac OS X 10.3 Panther
Compatible2003
Ran smoothly given the Quicksilver's gigahertz-class processor and expandable RAM.
Mac OS X 10.4 Tiger
Compatible2005
Fully supported thanks to clock speeds well above the 867MHz Leopard threshold.
Mac OS X 10.5 Leopard
Max Supported2007
Final PowerPC-compatible OS X release, fully usable on the 733MHz-1GHz Quicksilver models.
Reviews & Reception
Well reviewed for its refined design and gigahertz milestone, though clock-speed skepticism against PC rivals persisted.
The new brushed-silver case looks far more grown-up than its predecessor, and cracking the gigahertz barrier is a genuine milestone for the Mac platform.
A handsome, capable workhorse that finally lets Apple claim gigahertz bragging rights, even if Intel and AMD remain well ahead on paper.
Real-world video encoding tests show the Velocity Engine narrowing the gap with faster-clocked PCs, though the megahertz myth argument is wearing thin.
A solid, attractive upgrade for creative professionals already invested in the Mac ecosystem.