You'll install Sierra from scratch and this is the phrase that is launching the installation of the new macOS Sierra to various users after performing a clean installation. This error that it throws is more common than we think and many of you are commenting that the message appears: "Failed to verify the signature of the installer payload" after installation. Today we are going to offer a solution to the problem that strangely does not directly affect all users who install from scratch the new operating system launched on September 20 by Apple and that affected the fatigue partner Luis, and gave us a solution to the problem.
It seems the reason why the signature check is failing it is because the date is wrong. In this case the solution to the problem is to perform these steps in Terminal and it is much simpler than it may seem. In this case if we have internet connection We open Terminal and type this command:
ntpdate -u time.apple.com
Once done We will see that the current time and date appear in Terminal allowing to continue with the installation process of mac OS Sierra no problem.
Set manual date and time
In the case of users who do not have a network connection, the previous command gives them an error or simply wants to set the current date and time manually, you just have to follow the following steps. We type "Date" in terminal to see what is really wrong and then we write it like this: (month) (day) (hour) (minutes) (year)
It is strange that not all users have had the problem, but it is true that a good number of users are affected and it seems that it has to do with the machine itself. The truth is that this installation bug also appeared in previous versions of OS X and the solution goes through this time and date change in Terminal.