"Apple cannot check it for malicious software. Software needs to be updated" unable to install Desktop app on Mac

unable to install Desktop app on Mac

Error - Apple cannot check it for malicious software. Software needs to be updated or "...App can't be opened because it was not downloaded from the App Store."
Problem - Clients are unable to install Desktop app on Mac
Reason - mac doesn't like any third party software that isn't in the app store.
 
Screen Shot 2020-09-14 at 12.35.42 PM
 

To open up the app:

- go to System Preferences
- Click on Security and Privacy
- Click on the "General" tab in the top-middle of the screen
- Finally, in the "Allow apps downloaded from:" section, click on the button next to MangoVoice, that says Open Anyways
 
Here is a picture of that screen:
Screen Shot 2020-09-14 at 12.22.33 PM