Does this picture look familiar? Chances are that if you download open-source software frequently it is.
But there is a way to fix this. This guide will instruct you on how to fix this issue.
All you need to do is type this simple terminal command inserting the path to your app after the command.
xattr -dr com.apple.quarantine
xattr -dr com.apple.quarantine ~/Applications/your_app.app
Finally, press enter and you are done.