The Macintosh Plus computer was the third model in the Macintosh line, introduced on January 16, 1986, two years after the original Macintosh and a little more than a year after the Macintosh 512K, with a price tag of 2599 USD. As an evolutionary improvement over the 512K, it introduced RAM expansion from 1 MB to 4 MB, and the SCSI peripheral bus, among smaller improvements. It originally had the same generally beige-colored case as the original Macintosh ("Pantone 453"), but in 1987, the case color was changed to the long-lived, warm gray "Platinum" color.
 
Macintosh Plus 
Release date January 16, 1986
Introductory price $2599
Discontinued October 15, 1990
Operating system 1.1–2.1, 3.0–6.0.8, 7.0-7.5.5
CPU Motorola 68000 @ 7.8 MHz
Memory 1 MB, expandable to 4 MB (150 ns 30-pin SIMM)
Graphic Mode   512 x 342 dots
Monochrome
Tone Generator & Digital-Analog converter (22KHz sampling rate)
Size/Weight  34.5(H) x 24.5 (W) x 27.5 (D) cm / 7.48 kg
I/O Ports   RS 232/422 x 2 for printer and modem, SCSI, external F.D. unit, ext. loudspeaker
One 3.5'' 800 KB disk-drive
OS:   Macintosh System (from 3.2 to 7.5)

Our Mac Plus 1MB's have model numbers M0001A and M001AP the latter being 110 volts together with the original keyboard and mouse was kindly donated by Nick & Diane Reeves.

Manufacturer: Apple
Date: 10th January 1986

This exhibit has a reference ID of CH11814. Please quote this reference ID in any communication with the Centre for Computing History.