The Mac Plus was the third model of Macintosh computer after the
512K. The Mac Plus had a huge 1MB of RAM and could be expanded to a mind boggling (and especially wallet busting in 1986) 4MB! The Mac Plus also introduced the SCSI bus which became the main peripheral port for Macs until USB. Finally the Mac Plus was the first Mac in the Platinum colour which would become standard until the iMac (though earlier ones like mine were still in beige).
Otherwise the Mac Plus followed the same compact format as the two earlier Macs. Also later Macs like the
SE and
Macintosh II family eclipsed it it remained in production as the (relatively speaking) cheap low-end Mac until 1990. It had the longest production run of any Mac model and was supported until 1997, able to run Mac OS 7.
