macOS includes a technology called Gatekeeper, which ensures that only trusted software runs on your Mac or software that you know is from a trusted source. When software is downloaded from the Internet Gatekeeper will notify you that the software was downloaded from the Internet and ask you to verify that you want to open the software.
An app that has been notarized by Apple indicates that it passed a security check:
Apps that haven’t been notarized show a yellow warning icon:
Installing app from unidentified developer
If you’re certain that an app you want to install is from a trustworthy source and hasn’t been tampered with, you can temporarily override your Mac security settings and open it.
Go to the Finder
Control-click the app
Choose Open from the menu. A dialog box will appear, click Open
Enter your admin name and password when prompted
The app is now saved as an exception to your security settings, and you can open it in the future by double-clicking it, just as you can any authorized app.
If there are any questions or issues please contact IT Services