Shapes

Shapes is a drawing utility designed for Mac to help you create diagrams, charts, etc. This program might come in handy to people who need to design diagrams frequently and with minimum effort.
The application comes with a user-friendly interface and displays all of its built-in drawing tools on the left side of its main screen.

All you need to do is to drag-and-drop the diagram elements you wish to use in your project, adjust the size of the components if necessary, and you can export the resulting image.

Shapes also provides you with a quick and simple solution for printing the resulting diagrams, directly from its main window.

You won't be able to export your projects if you're using the trial version of the program. After registering the app, you will choose between various output formats, such as SVG, PDF, JPEG, etc.

Another thing you need to take into consideration is the fact that you can find cheaper solutions for designing diagrams on your Mac. However, other cheaper drawing apps aren't as user-friendly as this program. You will need to decide, based on your needs, which is the best choice for you.