Model Years: Late 1984, Early 1986

Initial OS: Macintosh System Software 1.0

Latest OS:
- Macintosh System Software 4.1 (Late 1984)
- Macintosh System Software 6.0.8 (Early 1986)

Released: September 10 1984

Discontinued: September 1 1987

Processor: 8MHz Motorola 68000

RAM Configurations Sold:
- 512k RAM

Display Specifications:
- 9" Monochrome CRT Display
- 512 x 342 display resolution at 68ppi

New Features:
- Increased RAM
- Increased software support