A similar question had been asked a year or two ago, but I wanted to see if anyone has any new answers. I'm looking for a lightweight UML sketching tool that runs on Mac OSX. I really only care for diagramming and do not need code generation, etc.
I prefer free, but am open to purchasing something if it's good and reasonable. I absolutely love Visio in conjunction with Pavel Hruby's UML stencils (http://softwarestencils.com/uml/index.html), but cannot stand to boot into windows whenever I need to diagram or make a quick edit. I've tried out OmniGraffle before, but found it was not as easy to use/edit as Visio.
Any suggestions?