Macintosh 128K

The Macintosh 128K, originally known simply as Macintosh, was the first Macintosh model to be commercially released, discounting the retrofit of the Lisa 2 into the Macintosh XL.

Specifications

 * CPU: 7.8336 MHz Motorola 68000
 * RAM: 128 KB
 * ROM: 64 KB
 * Drive: 1x 400 KB floppy disk
 * First supported OS: System 0.85 / 1.0
 * Last supported OS: System 3.2

The Macintosh 128K was not designed to be user-upgradeable, requiring third-party upgrades for more memory. Without a minimum of 512 KB of RAM, it did not have enough memory to support the first Apple HD20 hard drive.

Release
The Macintosh 128K was released amid fanfare on January 24, two days after the airing of the 1984 Apple ad during Super Bowl XVIII. However, it was met with a lukewarm response.

Name
Unlike later Macintosh models, the name "Macintosh 128K" did not appear anywhere on the exterior case and was only identified as "Macintosh" on the back of the first units to roll off the assembly line. The rear case was revised to include "128K" in red to differentiate it after the 512K model was released on September 10, 1984.