Gatekeeper by default will only open apps purchased and downloaded from
the Mac App Store or programs from developers that were furnished with
Developer IDs from Apple.

 

The Gatekeeper utility on the Mac is blocking the installation of the
EUB9603H utility because the installer does not have this digital
signature from Apple. As such, Gatekeeper will need to be disabled and set
to allow installation of software downloaded from
“Anywhere”.

 

Click on the Apple icon and select System Preferences.

Go to Security & Privacy and click on the General tab.

Select “Anywhere” option under the “Allow
applications downloaded from”.