Mac system installation file Prompt file is corrupted, can not open the solution

Mac system installation file Prompt file is corrupted, can not open the solution:

Modify System Configuration: System Preferences-security and privacy-any source. If there is no "any source" this option, because your system is MacOS Sierra 10.12, Apple in the new system to block this option, if this feature you do not open, you will not be able to use pirated or cracked version of the software, that is, you go to download any DMG installation files, will not open.

Workaround:

First: Turn off "system Preferences"

Second: Open "terminal" inside the application

Third: input: sudo spctl--master-disable

IV: If you are prompted to enter a password, please enter your computer power-on password, the whole process of input is not see the password, do not ignore, continue to enter after the press ENTER to confirm.

Five: Go back to "system Preferences-Security and privacy" Select "any source", then you can install the DMG files from anywhere.

Mac system installation file Prompt file is corrupted, can not open the solution