The Apple Macintosh Performa 475 features a 25 MHz 68LC040 processor, 4 MB of RAM, and a 160 MB hard drive in a sleek, compact "pizza box" case.

The educational version of the Performa 475 is the LC 475, and although the case is a bit different, the business version is the Quadra 605.

• 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:

October 18, 1993

Discontinued Date:

April 1, 1996

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:

68LC040

Details:

*This model has a 32-bit processor and a 32-bit data path. Sometimes this model is designated as having a 50 MHz processor, since the clock input runs at 50 MHz. However, the processor itself is not "clock doubled," so technically it only is a 25 MHz processor.

Processor Upgrade:

N/A

FPU:

None

Details:

N/A

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:

8k

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:

132 MB*

Details:

*Apple only officially supports up to 36 MB of RAM by installing a single 32 MB SIMM. However, third-parties have been able to upgrade it to 132 MB by installing a single 128 MB SIMM. 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:

*This model has slots for two 80 ns VRAM SIMMs.

Standard VRAM:

512k*

Maximum VRAM:

1 MB*

Details:

*By default, 512k of VRAM is installed as two 256k VRAM SIMMs. The VRAM can be upgraded to 1 MB by installing two 512k VRAM SIMMs.

Display Support:

Single Display*

Resolution Support:

512x384-1152x870*

Details:

*By default, this model 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, it can support a single display at 512x384 at 16-bit color, 640x480 and 832x642 at 8-bit color and 1024x768 and 1152x870 at 4-bit color. Upgraded to 1 MB of VRAM, it can support up to 832x624 at 16-bit color and 1024x768 and 1152x870 at 8-bit color.

2nd Display Support:

Single Display*

2nd Max. Resolution:

Variable*

Details:

*This model 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:

160 MB

Int. HD Interface:

SCSI

Details:

By default, this model is configured with a 160 MB 3.5" internal SCSI hard drive.

Standard Optical:

None

Standard Disk:

1.44 MB (Manual)

Details:

N/A

Standard Modem:

9.6k (External)

Standard Ethernet:

None

Details:

Bundled with a 9.6k external modem.

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 475

Details:

N/A

Apple Order No:

M1904LL/A*

Apple Subfamily:

Mac Performa 475

Details:

*M1904LL/A and M1904LL/B both refer to this model and originally differed only by location sold.

Apple Model No:

M1476

Gestalt ID:

89

Details:

Please note that these identifiers commonly refer to multiple models. Also see: All Macs with the M1476 Model Number and 89 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:

7.1P3

Supported Mac OS:

7.1P3-7.5.1, 7.5.3-8.1

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$1600

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:

*Bundled with a 9.6k external modem.

S-Video Input:

None

S-Video Output:

None

Details:

N/A

Microphone:

1 (PlainTalk)

Sound In:

None

Details:

N/A

Sound Out:

1 (8-Bit Stereo)

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, 30 Max Watts. Icon Credit: Apple Computer, Inc.

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