Acrobat Pro will do that. Acrobat Standard will too, but it's not available for OSX. Some free software is also capable of authoring forms, including Scribus and OpenOffice Writer.
Thank you. I wondered why I couldn't find Standard for OSX. I am thinking for what I want it would be easier to design the form using word or pages and pay someone doing desktop publishing to convert it to a fillable PDF. Adobe Pro X is a lot more software than I would ever use. For the rare occasions I do something like this the investment, both $ and time, wouldn't be worth it.
That probably a good idea, but I'd suggest finding someone who has a good amount of experience with PDF forms. Most DTP folks do not.