While Jobs saw a Smalltalk system during some Xerox PARC visit, the Mac was more influenced by the Xerox Star office system with its GUI, Desktop, Icons, ...
The programming language of the Xerox Star system was 'Mesa'. Which was much more like what Apple used: Clascal, Lisa Pascal, and then Object Pascal, ...
http://www.digibarn.com/collections/systems/xerox-8010/retro...
Compare that with a classical Smalltalk UI:
http://research.microsoft.com/en-us/um/people/blampson/38-al...
The programming language of the Xerox Star system was 'Mesa'. Which was much more like what Apple used: Clascal, Lisa Pascal, and then Object Pascal, ...
http://en.wikipedia.org/wiki/Mesa_(programming_language)