It’s important to be aware that genograms are a highly specific type of diagram requiring specific tools. To draw genograms that are effective and detailed enough, you need specific software but there are fewer options on Mac than there are on PC. The number of genogram apps on Mac are definitely less than for Windows PCs but there are a still some really great options like our top rated genogram drawing tool for Mac SmartDraw. Why Use Genogram Software vs Pen & Paper?.