
Updated iMac G3 with slot-loading CD drive, more colors, and faster processors.
Debuting October 5, 1999, the slot-loading iMac G3 represented Apple's first major internal redesign of its category-defining consumer machine, refining nearly every aspect of the original tray-loading iMac while preserving the translucent, all-in-one formula that had already reshaped the entire personal computer industry. Running the PowerPC G3 across an unusually wide range from 350 up to 700MHz over its extended production life and launching with Mac OS 9.0.2, the slot-loading iMac swapped the original's tray-loading CD-ROM mechanism for a sleeker slot-loading drive, a small but well-received usability improvement that also gave the machine a cleaner front fascia. Apple expanded the color lineup further beyond the original fruit flavors, eventually adding striking finishes like Graphite and Blueberry variations, and later models introduced options for DVD playback and even a special-edition Blue Dalmatian and Flower Power pattern, reflecting Apple's continued willingness to experiment with the iMac as both a technology product and a fashion statement. Performance climbed substantially over the machine's long lifespan, with later revisions offering dramatically faster clock speeds, improved graphics, and expanded RAM and storage ceilings that kept the design relevant deep into the Mac OS X transition period. Because these New World ROM machines could run Mac OS X natively, many slot-loading iMacs enjoyed unusually long useful lives, serving as capable OS X machines for schools, families, and budget-conscious users well after faster G4-based Macs had launched. Reviewers appreciated the incremental but meaningful refinements over the original model, and by this point in Apple's comeback, the iMac's success was no longer in question, it had already proven itself as the machine that revived the company, so critical attention shifted toward evaluating how well Apple could sustain and iterate on that momentum rather than debating whether the concept worked at all. The slot-loading iMac's extended production run through late 1999 into 2000 meant it bridged the classic Mac OS era and Apple's early Mac OS X push, giving countless users their first exposure to Apple's modern operating system on hardware they'd already grown to love. Its continued sales success cemented the iMac not as a one-time fluke but as a durable, endlessly iterable product family, setting the template Apple would follow for years afterward: refine the winning formula, expand the color and configuration options, and let a strong original design carry a product line through multiple profitable generations.
The PowerPC 750 G3 spanned an unusually broad range in the slot-loading iMac, from 350MHz at introduction up to 700MHz in its final revisions, reflecting continuous refinement of the chip's manufacturing process over nearly two years of production. Even at its fastest, the G3 core remained efficient and cache-friendly, though by 2000 Intel's Pentium III had narrowed much of the earlier performance gap that the original G3 had opened against the Pentium II. Its long production run and broad clock-speed range made it one of the most widely deployed processors in Apple's consumer lineup during the classic Mac OS to Mac OS X transition.

1999
Shipped standard on the slot-loading iMac at its October 1999 introduction.

2001
Widely installed update bringing improved networking and stability.

2001
The final and most refined classic Mac OS release available for this hardware.

2001
Ran natively thanks to New World ROM architecture, giving many users their first Mac OS X experience.

2003
Generally regarded as the practical performance ceiling, especially on faster later revisions of this model.
The slot-loading iMac was warmly received as a smart, well-executed refinement of an already-beloved design, sustaining the iMac's cultural and commercial momentum through 1999 and beyond.
The slot-loading drive is a small change that makes a big difference, and combined with new colors, this iMac refinement feels thoroughly polished.
Apple continues to iterate smartly on a winning formula; faster processors and a cleaner drive mechanism make this the iMac to buy now.
The iMac's design magic hasn't worn off, and improved specs across this generation keep it competitive with budget Windows desktops.
New colors, new patterns, new speeds, the iMac keeps finding ways to stay culturally relevant well past its debut, a rare feat in consumer tech.