Cannot open the Mac App Store App

New computer... Cannot open via the icon on the lower shelf. Top Ribbon gray outside.

Not sure what you mean by lower tray.   Have you tried Apple logo (top left)... and click on App Store, 4th point downwards.

Tags: Mac App Store

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    Generally to searching for the above error message is specific to applications from the App Store or other, not about things like "Activity Monitor" and "System Preferences."

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    In

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    Such problems usually due to any hardware or software changes. I would like to know some information about this problem so that we can help you further.

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    I wait that LR5 appears in the Mac App Store so I can buy it.

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    See

    http://helpx.Adobe.com/Lightroom/KB/upgrade-Mac-App-version-Lightroom.html

    http://forums.Adobe.com/message/5403741#5403741

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