Mac users interested in Sketchbook pro for osx 10.6.8 generally download:
SketchBookPro is a complex application that enables you to create amazing drawings. The program provides many tools that help you realize the drawings that you want with ease. SketchBookPro offers many brush styles such as soft air brush, hard air brush, paint brush, felt tip pen, pencil, marker and many others.
SketchBook is a utility designed by the popular Autodesk company. The program is filled with various drawing tools and can be used by digital artists of all experience levels.
You can import pictures from your local directories and use the integrated tools to edit them or create new drawings from scratch.