Apple · Macintosh

Macintosh 512K

Released September 1984

A compact monochrome Macintosh with fixed 512 KB memory and removable floppy storage.

Model history · 2 models, 1984–1984

Specifications

Processor: 68000 8 MHz (Macintosh 512K)
CPU cores: 1
Memory: 512 KB
CPU: 8 MHz 68000 with a 16-bit data path; no PMMU, FPU, cache or second processor
Memory type: Fixed 0.5 MB onboard RAM, 64K ROM; no RAM slots or built-in memory expansion
Storage type: 400K removable floppy drive with manual loading; no internal hard drive, hard-drive interface or internal CD drive
Expansion slots: None

Screen size: 9″
Resolution: 512 × 342
Panel: CRT
Display type: Built-in monochrome CRT with one-bit bitmap; 9-inch diagonal confirmed in Apple's original SE/30 owner manual, Macintosh product-line appendix. Apple explicitly notes 512 × 342 pixels, correcting its generic table's 512 × 384

Ports: Headphone jack
Back ports: External floppy DB-19, printer and modem serial ports and speaker/headphone output; no SCSI, Ethernet or external video. Serial ports do not support handshaking or synchronous modems

Type: All-in-one
Operating system: macOS
Size and weight detail: Maker 16.5 lb; 13.6 in height × 9.6 in width × 10.9 in depth, retained in original units
Power supply: Maximum 60 W, 105–125 V, 50–60 Hz, 0.5 A; 4.5 V alkaline
In the box: Original system software 0.7; maker introduction 10 September 1984 and discontinuation 14 April 1986. Actual shipping month September 1984 comes from Macworld's historical timeline; no exact first-sale day adopted

Processor	Memory	Storage
68000 8 MHz (Macintosh 512K)	512 KB	–

Model	Type	Processor	Memory	Storage	Screen	Weight	Released
AppleMacintosh 512Ke	All-in-one	Motorola 68000 8 MHz (Macintosh 512Ke)	512 KB	–	9″	7.5 kg	–
AppleMacintosh XL	All-in-one	68000 5 MHz (Macintosh XL)	512 KB – 1 MB	10 MB	12″	–	1985
AppleMacintosh 128K	All-in-one	68000 8 MHz (Macintosh 128K)	128 KB	–	9″	–	Jan 1984

Previous model: Macintosh 128K. Newer model: Macintosh Plus.