First up—check out this piece I wrote from the 1994 Macworld Expo San Francisco: “RAM Doubler” (10 January 1994). Developed by Connectix, RAM Doubler was one of the most magical utilities of the early days of the Macintosh. As its name suggested, RAM Doubler promised to double the amount of usable RAM in your Mac, and amazingly, it generally delivered.
That was a big deal back in 1994 because RAM was shockingly expensive—$300 for an 8 MB SIMM at a time when I had 20 MB in my Centris 660AV. For $50, RAM Doubler would double whatever you had: 8 MB to 16 MB, or 20 MB to 40 MB. It was astonishing.
One of the best Mac apps ever. In reading my review of RAM Doubler 2, I was amused to remember that a key feature of RAM Doubler was saving scarce hard drive space. Apple’s virtual memory required space equal to the amount of RAM, even to enable file mapping, whereas RAM Doubler could do that without needing any space. And its swap file only had to be the size of the spill, rather than the total amount of virtual memory.