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. I/O Ports RS 232/422 x 2 for printer and modem, SCSI, external F.D. Tone Generator & Digital-Analog converter (22KHz sampling rate) Memory 1 MB, expandable to 4 MB (150 ns 30-pin SIMM) 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. 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. 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. Apple Macintosh Plus 1MB Home > Browse Our Collection > Computers > Apple Computers > Apple Macintosh Plus 1MB

Mac plus computer case