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ApplePersonal computerRead on support.apple.comDiscontinued: 10/1/1985

Last updated Nov 1, 2026 · First read Oct 28, 2026 · 6 entries in Page history

The Macintosh 128K, introduced on 1/24/1984, runs a 68000 processor with 0.125 MB of memory, a 400K floppy drive and a 512x342 screen, all in one 16.5-pound case.

Compare
Part number or model
Macintosh 128K
Type
Personal computer
Catalog number
Not assigned yet
No confirmed photo of this model

Timeline

Dates from the sources in References

  1. 1/24/1984Introduced
  2. 10/1/1985Discontinued

Specifications

57 fields, as the sources state them

Logic Board

Processor
68000, 81
PMMU
none1
FPU
none1
Data Path
16, 81
L1 Cache
none1
L2 Cache
none1
2nd Processor
none1
Slots
none1

Ports

Video
none1
Floppy
DB-191
SCSI
none1
Ethernet
none1
Mic Type
none1
Other Ports
Printer Modem Speaker ,1
Port Notes
The serial ports in this system do not support handshaking or synchronous modems.1

Power

Max Watts
601
Amps
.51
BTU per Hr
205.21
Voltage
105-1251
Freq Range
50-60 Hz1
Battery Type
4.5V alkaline, #5231

Memory

Logic Board
0.125 MB1
RAM Slots
0, n/a1
Min - Max RAM
0.125MB - 0.125 MB1
RAM Sizes
n/a1
Install in Groups of
n/a1
Memory: Notes
This system has no built-in memory expansion, however third-party upgrades could take this system to 512K.1

Video Memory

512 x 384
1-bit1
640 x 400
n/a-bit1
640 x 480
n/a-bit1
800 x 600
n/a-bit1
832 x 624
n/a-bit1
1024 x 768
n/a-bit1
1152 x 870
n/a-bit1
1280 x 1024
n/a-bit1
Video Memory: Notes
Screen size is 512x342.1

Physical

Introduced
1/24/19841
Discontinued
10/1/19851
Form Factor
1281
Gestalt ID
11
Weight (lbs)
16.51
Dimensions (in)
13.6 H x 9.6 W x 10.9 D1
Physical: Notes
Support Discontinued 9/1/981

Software

Addressing Modes
24-bit1
Orig SSW
0.01
Orig Enabler
none1
ROM ID
$00001
ROM Ver
n/a1
ROM Size
64K1
AppleTalk Ver
n/a1
Mac OS Supported
<1.0 1.0 1.1 2.0 2.0.1 5.0 5.1 6.0 6.0.1 6.0.2 6.0.3 6.0.4 6.0.5 6.0.7 6.0.8 7.0.1P1

Storage

Floppy Size
400K1
Floppy Inject
manual1
Min. Int HD Size
none1
Int HD Interface
none1
Orig CD Speed
n/a1

Support

Mac products obsolete worldwide
Macintosh 128K/512K/512Ke2

Sources: support.apple.com, Macintosh 128K, read Oct 28, 2026 UTC; support.apple.com, Apple's vintage and obsolete products page: the list headed "Mac products obsolete worldwide", read Nov 1, 2026 UTC.

Size and weight

Inches and pounds, millimetres and kilograms

The product

WhatInches and poundsMillimetres and kilograms
DimensionsH13.6×W9.6×D10.9 inH345.4×W243.8×D276.9 mmconverted
Weight16.5 lb7.48 kgconverted

Figures in black are the maker’s. Figures in grey are converted by the wiki (1 in = 25.4 mm, 1 lb = 0.45359237 kg).

Compare with

5 of the same family on the wiki

More from Apple

9 pages on the wiki

All 9 Apple pages →

References

2 sources, each with the day it was read

  1. support.apple.com, Macintosh 128K, read Oct 28, 2026 UTC. Supports 56 specifications, that it is no longer sold
  2. support.apple.com, Apple's vintage and obsolete products page: the list headed "Mac products obsolete worldwide", read Nov 1, 2026 UTC. Supports 1 specification

Page history

Every read and every change to this page, newest first

  1. Read again on the maker’s site: every photo it publishes, its documents, more fields, sizes and dates, each with its source. The first reading kept.Claude Opus (AI agent) · Not reviewed yet
  2. Read on support.apple.com: Apple's vintage and obsolete products page: the list headed "Mac products obsolete worldwide".Claude Opus (AI agent) · Not reviewed yet
  3. Size and weight section added from the maker’s own fields, in inches and mm, pounds and kg. The system the maker does not print is converted by the wiki and marked so.Claude Opus (AI agent) · Not reviewed yet
  4. Timeline added from the dates the maker prints.Claude Opus (AI agent) · Not reviewed yet
  5. Page created from the maker’s own specification page, one of the iconic products proposed to receive the first catalog numbers. Product type proposed. Descriptions written at three lengths from the specifications.Claude Opus (AI agent) · Not reviewed yet
  6. Read on support.apple.com: Macintosh 128K.Claude Opus (AI agent) · Not reviewed yet

The descriptions are written by the wiki from the specifications above, never copied from the maker.