How to install of a package.
When a downloaded package is double-clicked, the following dialogue appears.
![](images/modal_win_images/Can't be opened.png)
Countermeasure.
"Right click" or "Control key" + the icon clicked and "Open" is chosen.
![](images/modal_win_images/Control key open.png)
"Open" button click on the next dialogue.
![](images/modal_win_images/Open btn click.png)
A package would normally open.
The type of the PC's password is needed.
![](images/modal_win_images/Type password.png)
More Information.
Launch "System Preferences" => Choice "Security & Privacy"=> Choice besides "Mac App Store"
![](images/modal_win_images/Preferences.png)