The Apple Macintosh LC III features a 25 MHz 68030 processor, 4 MB of RAM, and an 80 MB hard drive in a compact, easy-to-upgrade "pizza box" case.

Although the LC III looks effectively identical to the LC II before it, internally the LC III has significant improvements including a faster processor on a 32-bit bus, support for faster and more RAM and improved graphics capability. It has a different PDS slot, as well.

The consumer version of the LC III is the Performa 450.

Please note that the picture is an LC 475 and the LC III design is similar, but has a "flatter" front with a groove rather than a sleek curve. EveryMac.com eventually will swap out this photo with a more precise one.

• Tech Specs
• Ports

Click on the category for related details. The most commonly needed info is "open" by default, but all info is important.

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Introduction Date:

February 10, 1993

Discontinued Date:

February 14, 1994

Details:

The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" refers to the date a model either was replaced by a subsequent system or production otherwise ended. Also see: All Macs introduced in 1993.

Processor Speed:

25 MHz

Processor Type:

68030

Details:

This model has a 32-bit processor and a 32-bit data path.

Processor Upgrade:

Third-Party*

FPU:

68882 (Optional)

Details:

*A variety of third-party processor upgrades and accelerators were available.

System Bus Speed:

25 MHz

Cache Bus Speed:

N/A

Details:

N/A

ROM Type:

Macintosh ROM

ROM Size:

1 MB

Details:

N/A

L1 Cache:

0.5k

L2 Cache:

N/A

Details:

N/A

RAM Type:

72-pin SIMM

Min. RAM Speed:

80 ns

Details:

N/A

Standard RAM:

4 MB

Maximum RAM:

36 MB

Details:

Also see: Actual Max RAM of All G3 & Later Macs.

Motherboard RAM:

4 MB

RAM Slots:

1

Details:

N/A

Video Card:

Dedicated*

VRAM Type:

VRAM SIMM*

Details:

*The Macintosh LC III has 512k of onboard VRAM and a single slot that accepts a 256k 100 ns VRAM SIMM.

Standard VRAM:

512k*

Maximum VRAM:

768k*

Details:

*512k of VRAM is soldered onboard. A single VRAM slot accepts a 256k VRAM SIMM for a maximum total of 768k of VRAM.

Display Support:

Single Display*

Resolution Support:

512x384-832x624*

Details:

*By default, the Macintosh LC III only supports a single display, but a second one can be supported with the addition of an LC III PDS video card. With the default 512k of VRAM, the LC III can support a single display at 512x384 or 640x480 at 16-bit color and 832x624 at 8-bit color. Upgraded to 768k of VRAM, it can support up to 832x624 at 16-bit color.

2nd Display Support:

Single Display*

2nd Max. Resolution:

Variable*

Details:

*The Macintosh LC III can support a second display with the addition of an LC III PDS video card. By default, it only supports a single display.

Standard Hard Drive:

80 MB

Int. HD Interface:

SCSI

Details:

By default, the Macintosh LC III was typically configured with an 80 MB internal SCSI hard drive.

Standard Optical:

None

Standard Disk:

1.44 MB (Auto)

Details:

N/A

Standard Modem:

None

Standard Ethernet:

None

Details:

N/A

Expansion Slots:

1 LC III PDS

Expansion Bays:

None

Details:

By default, both the floppy disk and 3.5" hard drive bays are occupied.

Case Type:

Desktop

Form Factor:

Macintosh LC

Details:

N/A

Apple Order No:

M1312LL/A

Apple Subfamily:

Macintosh LC III

Details:

M1312LL/A refers to a configuration with 4 MB of RAM, 512k of VRAM, and an 80 MB hard drive.

Apple Model No:

M1254

Gestalt ID:

27

Details:

Please note that these identifiers commonly refer to multiple models. Also see: All Macs with the M1254 Model Number and 27 Gestalt ID. For more about identifiers and how to locate them on modern Macs, please refer to EveryMac.com's Mac Identification section.

Battery Type:

3.6V Lithium

Battery Life:

N/A

Details:

N/A

Original Mac OS:

7.1

Supported Mac OS:

7.1-7.5.1, 7.5.3-7.6.1

Details:

Earlier and later versions of the Macintosh System/Finder and Mac OS are not supported.

Dimensions:

2.9 x 12.2 x 15.3

Avg. Weight:

8.8 lbs (4 kg)

Details:

In inches - height by width by depth, (7.4 cm, 31 cm, 38.9 cm).

Original Price (US):

US$1350

Est. Current Retail:

N/A*

Details:

*As a collector's item, this model may still retain value. Photo Credit: Apple Computer, Inc.

Click on a category for additional details. The most commonly needed info is "open" by default, but all info is important. The icons correspond with the icons for each port on the computer.

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Video (Monitor):

1 (DB-15)

Floppy (Ext.):

None

Details:

N/A

ADB:

1

SCSI:

1 (DB-25)

Details:

N/A

Serial (Standard):

2

Serial (Geoport):

None

Details:

Serial ports are marked by printer and modem icons.

Modem:

None

Ethernet:

None

Details:

N/A

S-Video Input:

None

S-Video Output:

None

Details:

N/A

Microphone:

1 (Omni)

Sound In:

None

Details:

N/A

Sound Out:

1 (8-Bit Mono)

Headphone:

None

Details:

N/A

Security (Lock):

1

Joystick (PC):

None

Details:

N/A

Power:

1

Power Adapter:

N/A

Details:

100V-240V AC, 47-63 Hz Frequency, 50 Max Watts. Icon Credit: Apple Computer, Inc.

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