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How to install an app in macOS Sierra that’s not signed by a developer

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Howard Robertson can’t get a piece of software he uses to run in macOS Sierra:</p>

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The guys who make the program are not recognized developers for Mac. However, I have used this app for years (it’s required for work). How can I install it with the new restrictions on installing apps in Sierra?</p>

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The kind of app Howard’s referring to is one that’s “unsigned” by its developer. That means that while it’s legitimate software that can launch in macOS, the software maker hasn’t gone through the steps to be active in Apple’s developer program, which costs $99 per year, and obtain a cryptographic certificate.</p><p>
When an active developer creates an app, Apple uses that certificate and its own encryption data to “sign” it, which allows a user to know that the app hasn’t been modified between when the developer created the app and when it reached the user. This reduces the chances of malware. Apple has information about the developer and can revoke the certificate if they engage in malicious activities, preventing their apps from running on Macs in the future.</p><p class="jumpTag"><a href="/article/3140183/macs/how-to-install-an-app-in-macos-sierra-thats-not-signed-by-a-developer.html#jump">To read this article in full or to leave a comment, please click here[/url]</p></section></article>

Source: How to install an app in macOS Sierra that’s not signed by a developer (http://www.macworld.com/article/3140183/macs/how-to-install-an-app-in-macos-sierra-thats-not-signed-by-a-developer.html#tk.rss_all)