Introduced in January 1986, two years after the original
Macintosh, the Plus came with 1MB of RAM, a new double-sided 800KB
floppy drive, and a built-in SCSI port (the first Mac so equipped).
Not only was 1MB more RAM than the PC-class machines could handle,
but the Plus could be expanded to 4MB total RAM!
The original Plus came in Apple beige; during 1987 the case color
was changed to platinum, the same color as current Macs. There are
unsubstantiated rumors that the power supply in the beige Plus was
less reliable and more prone to failure with 4MB configurations, a
problem resolved with the "new" Plus. (All desktop Macs since the
Plus have included a fan to reduce internal heat.)
The Plus was the last Mac not to use ADB ports for the
keyboard and mouse; it was the first to use DIN-8 serial ports.
Computer Museum and
Plus Sites of Interest. Read the BYTE
Preview. Here's one user's
Mac Plus story.