During this weekend, the user @DongleBookPro has published various images of what he claims to be a Macintosh Classic prototype with a transparent casing used to show the internal components of the device during its development, a model that hit the market with a gray casing.
The photographs published by this user show the all components that are part of the equipment, in a transparent box, which allows us to easily see the interior layout of this equipment, with a gigantic tube screen (CRT) occupying most of the interior.
Prototype Macintosh Classic
– Dongle (@DongleBookPro) December 5, 2020
At the bottom is the rest of the hardware, as there was no more physical space available due to the size of the screen. Inside the housing is shown Made in Singapoure. On the front, we find the Apple logo with the color of the rainbow on one of the sides.
On the back, we can read that it is a exclusive development unit “Unit is for development purposes only” and that it will not be sold in the United States “not to be sold in the United States of America”, thus confirming that it is a prototype that did not reach the market.
This type of prototype was used to check lthe effectiveness of thermal management systems, blowing smoke inside and watching where it was going with the movement of the fans installed inside.
The final version of this prototype was sold from October 1990, it was managed by a Motorola 68000 processor at 8 MHz, it had 1 MB of RAM (expandable up to 4 MB), a 9-inch monochrome screen with 512 × 342 resolution, a hard disk with a 40 MB SCSI connection, a disk drive 3.5 inches and weighed just over 7 kg. In October 1991, the second version of the Macintosh Classic was released.