: Some applications conflict with others. Try closing all other applications and then try to run the blocked application.
Apple’s "Gatekeeper" prevents the installation of apps not found in the App Store. 1. Use the Shortcut Locate the app in . Control-click (or right-click) the app icon. Select Open from the menu. A dialog box will appear; click Open again to confirm. 2. System Settings Override Go to System Settings > Privacy & Security . Scroll down to the Security section. Look for a message saying the app "was blocked from use." Click Open Anyway . Unblocking Apps at the Network Level how to unblock application
When you download a new app, Windows might display a blue window saying it has been blocked to protect your PC. : Some applications conflict with others