If you simply want to know what a resume is supposed to look like, you might find this site is helpful.
I don't know of any OS X software designed especially for making resumes. In addition to MS Word and AppleWorks, I can also recommend a program called LetterWorks. See http://www.objectpark.net/letterworks.html
If you poke around the templates section of AppleWorks 6, and follow the Web links, you get pointers to these resume templates: