A problem so that macOS installation Sierra cleaning!

Hello.

I tried to perform a new installation of macOS Sierra on my MacBook Pro (15-inch, mid 2010), but whenever I do, I get a message (only during the last minute of the preparation for installation) saying, "the Office Installer signature verification failure. If someone please tell me what this means and how to fix? I would be grateful!

Either way, I previously successfully installed OSX previous versions on my MacBook Pro and all installations went smoothly and without problems. macOS Sierra is clean-installed successfully on my iMac (27 inch, mid-2011)!

Generally, this means that something is damaged in the installation image.

Try to download the installer again.

Tags: Mac OS & System Software

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