Susan Kare designed the original icon set for the Mac back in 1983. In addition, she also designed the font Chicago. Chicago was the Mac’s Finder font in System 1 (and before) through Mac OS 9.2.1. Chicago is also used in the original iPod interface.
Kare continues to design and maintains a fascinating website:
Ages ago, I found a Susan Kare interview on Stanford’s Library site. It’s still available and includes a very impressive Mac history lesson, Making the Macintosh: Technology and Culture in Silicon Valley.
Susan Kare is truly a Macintosh icon.