MacOS includes built-in protection for apps downloaded from the internet. Since you download Coach 7 from our website, you’ll need to confirm that you trust the software after installing it. To do this, open a Finder window and navigate to the Applications folder. Right-click on the Coach 7 icon and select Open (or hold the Command key and click Open). You’ll be asked to confirm that you trust the program, and Coach 7 will then launch. This step only needs to be done once.
Alternatively, you can go to System Preferences → Security & Privacy → General, and allow the Coach 7 app there.
Here you will find the explanation from Apple.