Computer cannot be verified

Hello

I opened two applications that I use regularly on my iMac and as of today, they have both asked to log on to my App Store because the app I want to open was bought on another device. First of all the apps were bought on this computer and after I login I get an error message that my computer can not be verified...

Even when I log on to my App Store app on my computer, I get this error message, but there is no problem when you connect online.

Someone knows what can be the problem?

My credit card was valid until 3/2016, so I thought it was at the origin of the problem, but I still get the same error messages after the recording of my new credit card details.

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Please, back up all data before proceeding.

Step 1

Triple-click anywhere in the line below on this page to select this option:

/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist

A right click or Ctrl-click on the line and select

Services ▹ reveal in Finder (or just to reveal)

of the contextual menu.*, a file must open with a selected item. Move selected item to the trash. You may be prompted for administrator login password. Restart the computer and test.

If there is no change, repeat with this file:

/Library/Preferences/SystemConfiguration/com.apple.network.eapolclient.configuration.plist

* If you do not see the item context menu copy the selected text in the Clipboard by pressing Control-C key combination. In the Finder, select

Go ▹ go to the folder...

from the menu bar and paste it into the box that opens by pressing command + V. You won't see what you pasted a newline being included. Press return.

Sign out and sign test. If there is no improvement, continue.

Step 2

Reset the PRAM from your computer.

Tags: Mac

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