I have just uploaded iftop 0.14. New features:

- Works on MacOS X - Minor fix to no DNS resolution mode - Includes Chris' if-this-doesn't-work-you-need-a-better-OS forking resolver as a fall back.

Available from:

http://www.ex-parrot.com/~pdw/iftop/download/iftop-0.14.tar.gz

Paul