Update of the Sierra did not update

I'm under 10.11.6 on a 2013 11 "Air w / 8 gb and 92 GB of free space on my ssd.  This morning, before I went to have breakfast, I plugged the computer to the power brick and ran the update for Sierra.  When I came back home and connected to the computer I ran "about this mac" in the Apple menu and indicated that I was always running El Capitan.  I searched my ssd to see if there is perhaps a .dmg file or file install somewhere, but there was not.  I also looked in the section updates from the apple app store to see if she was still showing Sierra, but it wasn't.  Also, I rebooted the computer and no change.

Can someone enlighten me on what happened here?

Looks like there was a problem with the download, installation failed.

Try to do it again and this time stay with her so that you can see what is happening.

You do backup before the upgrade?

Tags: Mac OS & System Software

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