How to launch any macOS app, even those not notarized by Apple

Attempts to run old software on a Mac could fail because they haven't been notarized by Apple. Here's how to run downloaded apps without being blocked by macOS Gatekeeper. Downloading applications from the Internet can be a hazardous task, with the high potential for software to become a problem. Acquiring a download could, in a worst-case scenario, lead to the installation of malware that could wipe data or hold it at ransom.Downloading apps from the Mac App Store is also a solid plan for ensur...