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For months now, I have been trying to find a solution as to why About this Mac will not show my Mac's year and model. I have just now found a solution that has worked on every OS X Version from Lion (10.7) to El Capitan (10.11).
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We first must understand how About this Mac shows the year and model.
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Check to make sure your serial number is valid.
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Using a newer Mac, go to https://checkcoverage.apple.com
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Enter the Mac's serial number (the one you are fixing, not the one with the webpage), and a code that Apple makes you put in.
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In order to fix this issue, we have to use Keychain.
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Open Keychain by searching for it using Spotlight.
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In the sidebar, you will see "Certificates." Click that.
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You will also see "System Roots." Click that as well.
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Now click on the first Certificate, and then click the "i" button in the bottom of the window.
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Another window will appear.
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In the window that pops up, click the "Trust" tab.
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Then click the box "When using this certificate." It will say "Use System Defaults" by default.
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Now choose "Always Trust" instead.
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Close the window and enter your username and password to allow.
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Now repeat steps 5-7 for the rest of Apple's Certificates.
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Head back to About this Mac to see if the Year and Model show up.
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If for some reason About this Mac still does not show the year, do not worry. There is one other thing you can do. You can force the Mac to make a new certificate.
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To do this, click the "Support" tab in About this Mac.
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Then choose "User Manual."
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A Safari window will open with a new error.
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Click the "Show Certificate" button.
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Similar to before, choose "Trust,"
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"When using this certificate,"
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"Always Trust."
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Click Continue,
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and enter your username and password to allow.
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Close all of the windows (including About this Mac).
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Now open About this Mac again, and it should show you your Mac's year and model.
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Hopefully this will have fixed the issue with your Mac. If for some reason this did not work, drop a comment down below.
Hopefully this will have fixed the issue with your Mac. If for some reason this did not work, drop a comment down below.
