The Macintosh wasn't the first personal computer the same way the iMac wasn't the first all-in-one, or the iPod wasn't the first MP3 player: it wasn't, except for most people, it was. It wasn't anything fundamentally new or special, but it changed everything.

As for influence... True, lots of people have been strongly influential. Take Tim Berners-Lee, who invented HTTP, HTML, and the first web browser... On a NeXT, a computer built by one Steve Jobs.