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Digital Research's GEM was able to do a better job than early Windows of getting the Lisa/Mac UI style/paradigm on PC hardware. So much so that Apple sued them.
by cmrdporcupine 3y ago
Digital Research's GEM was able to do a better job than early Windows of getting the Lisa/Mac UI style/paradigm on PC hardware. So much so that Apple sued them. And they got to market sooner than Microsoft.
Though their original target wasn't a Mac clone, it borrowed Mac UI elements. Lee Jay Lorenzen left Xerox and joined DR because he couldn't sell Xerox on the idea of getting Xerox Star functionality onto commodity 8080/8086 class machines.
Another early one was VisiOn, from the VisiCalc folks, which had a very nice (for the time) minimalistic look and feel https://en.wikipedia.org/wiki/Visi_On https://en.wikipedia.org/wiki/Visi_On