How to Bypass “Safari no longer supports unsafe extension” Error in Mac OS Mojave

If you try to install an older Safari extension in modern Mac Safari versions, you will see an error message stating “Safari no longer supports the unsafe extension “Extension name”. You can find newer extensions reviewed by Apple in the App Store or Safari Extensions Gallery.”
This error occurs because the latest versions of Safari in MacOS do not support extensions that do not have a certificate, or are obtained from outside the Mac App Store and Safari Extensions Gallery, as they are considered unsafe. Nonetheless, some advanced users may want to run these ‘unsafe’ Safari extensions anyway.
This tutorial will show you how to bypass the ‘Safari no longer supports unsafe extension’ error in MacOS Mojave 10.14.x and onward.















