SketchyDraw is a free and open source OS X app that will allow you to create graphics using your Mac.
While using the SketchyDraw utility shapes can be created by selecting a tool from from the Tools panel and a desired vector format.
Here are some key features of "Sketchy Draw":
Windows and Panels:
· In addition to the document window, there are various panels and windows.
· Object creation is initiated by dragging the mouse. You can cut, copy and paste any object, even into other programs.
· By executing various commands from the main menu, then general image format or export or save the document. Modification of the text object is primarily done using the main menu.
· You can save your picture either as a SketchyDraw file or as PDF or TIFF, EPS, or SVG.