Rare clear-case EVT (Engineering Validation Test) prototype of the Macintosh Portable computer, model M5126, the upgraded version of the first battery-powered Apple laptop. The rare portable computer features a hinged active matrix 9.8˝ LCD screen, built-in carrying handle, full-size QWERTY keyboard, and built-in trackball. The rear panel features ports for power, sound output, external display, and external SCSI drive; the opening for the modem phone line jack is not populated. Tested to boot up and in fine cosmetic condition. Accompanied by a Macintosh Portable Rechargeable Battery, A/C adapter, and Macintosh Portable carrying case.
The Macintosh Portable, released by Apple in 1989, was the company’s first attempt at a battery-powered, portable computer. While innovative for its time, featuring an active-matrix LCD screen and a lead-acid battery, it was bulky, heavy (over 16 pounds), and expensive, which limited its commercial success. Despite these drawbacks, the Macintosh Portable laid the groundwork for Apple’s future advancements in mobile computing, demonstrating the feasibility of a fully functional, battery-powered Mac and influencing the design of later PowerBooks, which refined portability and usability.
Apple's extremely rare transparent-case prototypes offer a unique aesthetic and are highly valued by collectors. The see-through case offered unique advantages during internal testing and development, allowing engineers to observe internal components without disassembly. Clear housings were also used for 'smoke testing,' a process used to visualize airflow through to computer and ensure adequate cooling capabilities. This clear Macintosh Portable prototype is incredibly rare as one of just seven known to exist.
