Can't install on MacBook Pro

I tried to install HARMS on my MacBook Pro and got the message, HMRS can’t be opened because Apple cannot check it for malicious software. This software needs updated. Contact the developer for more information.
Any help?
Thank you

AFIK you just have to be insistent that you really want to take the risk before Apple will let you open it. Here’s what I end up doing:

Assuming that the program is in the applications folder, open the applications folder in the Finder. Right click on the application and select open, resulting in a popup window that suggests I want to delete the application and not giving me the option of opening it. Cancel that request and repeat the right-click open request. This time the popup has an option to open the application anyway, which is what I choose. Subsequently just double clicking on the application icon works fine.

Rick, K3IV

Thank you Rick,
It worked.
Cheers, 73

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