You can override your Mac security settings to open a new app.
- In the Finder on your Mac, locate the app you want to open.
- Don’t use Launchpad to locate the app.
- Control-click the app icon, then choose Open from the shortcut menu.
- Click Open.
The app is saved as an exception to your security settings, and you can open it at any time by double-clicking it, just as you do with any registered app.
You can also grant an exception for a blocked app by clicking the Open Anyway button in the General pane of Security & Privacy preferences. This button is available for about an hour after you try to open the app. To change these preferences on your Mac, choose Apple menu > System Preferences, click Security & Privacy, then click General.
You can learn more about how and why your Mac is protected. See the Apple Support article Safely open apps on your Mac.