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.

49288 96268 gatekeeper headerDownloading 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 ensuring the Mac runs only safe software. This isn’t always possible, though. Sometimes, an app isn’t available from the Mac App Store, so you have to look elsewhere.

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