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Level 1

14 points

My App Store shows macOS High Sierra as “Installed”, but why do I see an older OS version (10.9.5) on About This Mac?

The problem is that the "Install" button on the macOS High Sierra is greyed out so I can't install it. I have a MacBook late 2009 model.

I’m not sure how to proceed. Maybe my OS is so outdated that it can’t be updated anymore?

MacBook, OS X Mavericks (10.9.5), MacBook Late 2009, 13 inch

Posted on May 12, 2018 10:05 AM

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Level 10

727,103 points

Posted on May 12, 2018 7:41 PM

The Mac App Store is referring to the installer, not the OS. Open it from the Applications folder or the Dock.

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