Alias today announced that SketchBook Pro, its pen-driven sketching and annotation software, is now available for Mac OS X. “The Mac community can now benefit from the fast, reactive, pressure sensitive artistic tools and intuitive user interface that make the software unique in its class. Along with a Wacom tablet, Alias SketchBook Pro’s realistic pens, markers, paintbrushes and airbrushes can be used to create everything from conceptual ideation sketches through to production artwork.”