|Introduced:||January 16, 1986|
|CPU speed:||8 MHz|
|Shipped with system version:||1.1|
|RAM:||1 MB, expandable to 4 MB|
|Discontinued:||October 15, 1990|
The Macintosh Plus was introduced two years after the original Macintosh. It originally shipped with a beige case, but during 1987 the case color was changed to the long-lived "platinum" color.
It was the first Macintosh model to include a SCSI port, which launched the popularity of external SCSI devices for Macs, including hard disks, tape drives, CD-ROM drives, printers, and even monitors.
The Mac Plus was the first of many Macintoshes to use SIMM modules for its memory. It came standard with 1MB of RAM (four 256K SIMMs) and could be upgraded to 4MB of RAM. It had 128K of ROM on the motherboard, which was double the amount of ROM that was in previous Macs; the new System software and ROMs included routines to support SCSI, the new 800K floppy drive, and, importantly, HFS, the Hierarchical File System, which used a true directory structure on disks. (This as opposed to the earlier MFS, Macintosh File System, which was used on 400K disks, in which all files were stored on the root of the disk, and the folders that the user saw were an illusion maintained at great expense by the Finder.) For programmers, the fourth Inside Macintosh volume detailed how to utilize the Mac Plus's new System software.
An all-in-one unit, the Plus had a one-bit, 9" black & white display with a resolution of 72-dpi, which was identical to that of previous Macintosh models. Unlike that of earlier Macs, the Mac Plus's keyboard included a numeric keypad, and, as with previous Macs, it had a one-button mouse and no fan, making it extremely quiet in operation.
The applications MacPaint, MacWrite and HyperCard were bundled with the Mac Plus. Third-party software applications available included MacDraw, Microsoft Word, Excel, and Microsoft PowerPoint, as well as Aldus's PageMaker. This was the introduction of GUI versions of Microsoft Word, Excel, and PowerPoint on any PC.