This occurs because a few of our install and update packages are signed with an older certificate.
You might see an "invalid certificate" error when installing Office for Mac 2011 or Lync for Mac 2011. Under App passwords, click Create a new app password. To fix this, get and enter a unique app password to sign in.
If you have two-step verification turned on, you might get an invalid product key error because Office doesn't prompt you for the extra security code during activation. Get an app password for two-step verification After the page refreshes, scroll back down to the Office for Mac updates section, and then click the Download Now button. If you can't open an application, go to, scroll to the to the Office for Mac updates section, choose the latest update available.
If you can, open an application like Word and click Help > Check for Product updates. In many cases, updating Office will fix the problem. In the Get Started wizard, click Sign in to an existing Office 365 subscription, and sign in with the email address that's associated with Office. Open an Office application and click Activate Now. Instead, sign in with the email address that's associated with Office. If you have an Office 365 subscription, you can't use your product key to activate Mac 2011. Microsoft does not guarantee the accuracy of this third-party contact information.Note: If your copy of Office came with a PIN instead of a product key, go to and enter your PIN to get your product key. This contact information may change without notice. Microsoft provides third-party contact information to help you find technical support. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products. The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Troubleshoot Office 2011 for Mac issues by completely uninstalling before you reinstall
Method 4įor information about how to remove and then reinstall Office, see the following article:
If you do not want to keep your existing account, you can rename the "Test" account that you create in the following procedure, and continue to use that account. If you can save when you use a new user account, contact Apple support to troubleshoot your existing account. Open Excel and check if the issue is resolved. (If this option is not available, just go to the next step).Ĭlick the Apple icon, and then click Log Out name. When you receive a warning, click OK.Ĭlick to select Allow User to Administer this computer. Type the word Test for the user name, and leave the password box blank. Log on by using your Administrator user name and password, and then click OK.
If you are not the Administrator of the computer, click Click the lock to make changes. Click Force Quit to quit the application. Select the application in the "Force Quit Application" window, and then select Force Quit. If you cannot quit an application or do not know how, hold down the Command and Option keys, and then press Esc on your keyboard. To quit an application, select the application on the toolbar (top), and then select Quit. You must quit all programs before you continue. To resolve this issue, try the following methods, in order, until the issue is resolved.