Sometimes, when you try to open an app that isn’t signed by an identified developer, MacOS will prevent it from launching and show a warning. If you trust the app, you can manually allow it to run by adjusting your security settings. The steps below show how to do this.
Open System Settings
Navigate to the Apple menu and click on "System Settings" (or "System Preferences" on older MacOS versions).
Locate Security Settings
Select "Privacy & Security" from the sidebar. Scroll down to the "Security" section.
Allow Aegis to Run
Look for the message "Aegis was blocked from use because it is not from an identified developer" (or something similar) and click "Open Anyway" next to it.
Confirm Your Choice
In the popup that appears, click "Open" to confirm you want to run Aegis.