Most reasons for this error is because the problem set by the system, because the system does not trust you downloaded from the rest of the software installation package, it will give you time to stop the run. Specific set of steps as follows:
1. Open System Preferences (System Preferences)
2. Open the Security and Privacy (Security & Privacy)
3. "Allow apps downloaded from (allow apps downloaded from)" is set to anywhere (anywhere)
4. By default, the system is not anywhere this option, then we need to how to set it?
The open system terminal (Terminal)
6. Run the following command (as is the sudo command, so you need to enter Apple account password)
sudo spctl --master-disable
7. Completion is now open again privacy and security, you can see anywhere up.