[valuearb]

There were many computers before the Xerox Alto.

Xerox never made the Macintosh because they missed key innovations such as regions, the Finder, consistent UI guidelines, the ability to put a usable GUI OS in an affordable package.

[musicale]

PARC was also bound to Xerox which had trouble seeing beyond its photocopier business.

[valuearb]

Doesn't matter what PARC's limitations were, what matters was the Macintosh was a huge innovation that created what the Xerox Alto and Star were missing.