Total Systems Gemini 20MHz 030 upgrade board installed

The first Mac that was genuinely good enough. The Plus shipped with 1MB of RAM standard, a double-sided 800K floppy, and - crucially — a SCSI port for external storage. Sold continuously for three years and six months, longer than any other Mac before it. Apple manufactured so many that a Plus often costs less than a Classic today, despite being older. The machine that proved the Macintosh concept was commercially sustainable. This specific computer, has a secret inside - a Total Systems Gemini 20MHz 030 upgrade board. This ingenious upgrade clipped onto the 68000 CPU and supercharges this machine with a much faster CPU.

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