Mac OS damaged Sierra install app?

My system specs are:

I tried to download macOS Sierra 7 times now.  Each attempt gave rise to receive this dialog at the end of each download and when a double click on the Setup application:

My system works fine.  It passes Apple Hardware Test brilliantly.  He scored 8100 on GeekBench 3.  So why can't get a good download of the installation of Sierra application?  What condition could Apple will conduct trials for which prevents me to update for Sierra?  After reading some of the problems encountered by others, perhaps I should wait!

Hello

This thread may help you: Mac OS sierra app is damaged

Tags: Mac OS & System Software

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