[SOLVED] MyTVSuper Cannot Install Silverlight on my Apple Macbook

To run myTVSuper on Safari, I need to install Silverlight. However, macOSX just not allow the install with a message:

"silverlight.pkg" can't be opened because it was not downloaded from the App Store

Your security preferences allow installation of only apps from the App Store...."

When I go to "System Preferences", "Security & Privacy", under "General", there is no option of "Allow apps downloaded from: Anywhere".

To allow apps from anywhere, try the following commands:

1) Search and open Terminal app.

2) Type "sudo spctl --master-disable" (this disable the standard Gatekeeper security mechanisms in Mac OS)

3) Go to "System Preferences", "Security & Privacy", under "General", check the option "Allow apps downloaded from: Anywhere".

4) Now, you can install the Silverlight normally. If the installer didn't work, try to force quit the installer and do it again.

5) Type "sudo spctl --master-enable" (this enable the standard Gatekeeper security mechanisms in Mac OS again)