The Macintosh plus was the 3rd in the line of Macintosh computers (after the original 128k and 512k macs), released in January 1986. It was the first Macintosh to include a SCSI expansion port, and the first to use the mini-din serial modem and printer ports that continued on through the late 90's when Apple switched to USB.

Mac Plus Stock specs:
  • 7.8MHZ 68000 CPU
  • 1MB Ram (expandable to 4MB)
  • 800K Floppy drive
  • First Mac to include SCSI port to drive a true high speed hard drive (external DB25 connection only)
  • 9" 1-Bit mono 512x384 CRT