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Question: Failed installation of Sierra

I tried to install Sierre.When the installing finished it was written that I Sierra could not be installed on my macbook and know there is gray scrren with one folder,I tried to many ways to fix it but it didn't work.What should I do.(Sorry if there are many mistakes ,but English is not my language)

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Nov 12, 2017 9:26 AM in response to Redfoxyy In response to Redfoxyy

Error message other than the could not be installed?

Do a backup, preferable 2 separate ones on 2 drives. Boot to the Recovery Volume (command - R on a restart or hold down the option/alt key during a restart) and select Recovery Volume. Run Disk Utility and select First Aid. Then re-install the OS.

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Nov 12, 2017 9:26 AM

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Question: Failed installation of Sierra