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Macintosh LC III
Mac LC
1990-1999

Macintosh LC III

Faster LC with 25MHz 68030. Supported up to 16-bit color at 640ร—480.

Introduced on February 10, 1993, the Macintosh LC III was the third iteration of Apple's affordable, education- and home-friendly LC line, and it delivered a meaningful performance jump by adopting a 25MHz 68030 processor, up from the 68020 of the original LC and the LC II, while also boosting graphics capability to support 16-bit color at 640x480 resolution on compatible displays, a genuine step up for a machine still aimed at budget-conscious buyers. Housed in the same compact, low-profile pizza-box case that had become synonymous with the LC family, the LC III retained the machine's signature expansion slot for an LC-compatible card, and it continued Apple's strategy of offering a real Macintosh experience, System 7.1 included, at a price point accessible to schools, families, and small businesses. The improved video circuitry meant the LC III could finally do justice to color-rich educational software and multimedia titles that were becoming increasingly common on CD-ROM, and its faster processor noticeably reduced the sluggishness that had made the LC II feel underpowered for anything beyond basic tasks. Compared to contemporaneous low-cost PC clones, the LC III offered a more polished, integrated software experience and superior out-of-box multimedia capability, reinforcing Apple's strong foothold in education markets during this period. It wasn't a powerhouse: the 68030 at 25MHz was modest even by 1993 standards, especially against the Quadra line's 68040 chips, and its integrated video shared system RAM, limiting resolution and color depth options compared to machines with dedicated VRAM. Still, for its target audience, the LC III represented an excellent value proposition, delivering tangible improvements over its predecessor without a significant price increase. It was well received by educators and reviewers who appreciated Apple's continued commitment to affordable, expandable Macs, and it helped extend the compact desktop form factor's popularity through the early 1990s. Variants and updates followed quickly, including LC III+ configurations with even faster clock speeds, reflecting how central this chassis remained to Apple's low-end strategy. Within the broader Mac lineage, the LC III sits as a critical entry in Apple's two-tier strategy of the era, complementing the high-performance Quadra towers with a genuinely capable, color-competent machine for cost-sensitive buyers, and it helped keep the Macintosh platform relevant in the increasingly price-competitive education and home computing markets of the early 1990s.

Launch price: $1,360

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Macintosh LC III1993โ€“1994

Full Specifications

Availability

IntroducedFebruary 10, 1993
DiscontinuedFebruary 9, 1994
Original OSSystem 7.1

Processor

CPUMotorola 68030
Clock Speed25 MHz
FPUNone

Memory

Standard RAM4 MB
Maximum RAM36 MB
RAM Type72-pin SIMM
RAM Slots1

Storage

Storage80 or 160 MB HDD

Display

DisplayExternal

Graphics

GPUBuilt-in
VRAM512 KB (expandable to 768 KB)

Expansion

Expansion Slots1 LC PDS

Connectivity

Physical

Processor Deep Dive

๐Ÿ”ฒ

Motorola 68030

Motorola
Architecture: m68k (32-bit CISC)
Introduced: 1987
Process: 1.5 micron HCMOS
Transistors: 273,000

The LC III's 25MHz 68030 replaced the 68020 used in earlier LC models, bringing an integrated MMU and improved instruction throughput to Apple's budget desktop line. This upgrade allowed the LC III to comfortably run System 7.1 with better multitasking headroom than its predecessors. It was a mature, well-proven chip by 1993, offering reliability and reasonable efficiency for cost-sensitive designs. Its presence in the LC III reflected Apple's strategy of trickling down proven silicon into affordable machines.

Mac LC progression ยท 3 of 3

Compatible Operating Systems

System 7.1

System 7.1

Launch OS

1993

The LC III shipped from Apple running System 7.1 out of the box.

System 7.5

System 7.5

Compatible

1994

Ran reasonably well, though users needed to manage RAM carefully given the LC III's typical memory configurations.

System 7.5.5

System 7.5.5

Max Supported

1996

Considered the practical performance ceiling for this 25MHz 68030 compact Mac.

Mac OS 7.6.1

Mac OS 7.6.1

Compatible

1997

Could be installed but performance was noticeably strained on the LC III's modest hardware.

Reviews & Reception

The LC III was well regarded as a solid, affordable step forward for Apple's education and home-focused compact desktop line.

The LC III's color video improvements make a real difference for classroom multimedia, finally doing justice to CD-ROM educational titles.

MacWorld
1993
4/5

A solid, if unspectacular, upgrade that delivers exactly the kind of value Apple's education customers have come to expect.

MacUser
1993
4/5

The shared-memory video architecture limits its ceiling, but for the price the LC III remains hard to beat.

InfoWorld
1993
3/5

Apple continues to dominate the education computing space, and the LC III's color capabilities only strengthen that grip.

BYTE
1993
4/5