I do it again, and I get this error — well, now I can’t show you because Excel is refusing to open up at all. The error indicates that my previous open was unsuccessful, and asks if I would like to open Excel in safe mode. So I close Excel, try to open it again without safe mode, and… nothing.

Install updates on a Mac

If you're a student or teacher and don't see an option to install Office, you may be eligible for Office 365 Education, which includes Word, Excel, PowerPoint, and OneNote. All you need to get started is a valid school email address. If that didn't help, use this troubleshooter to uninstall Office completely. If you're looking for the steps to download and install the latest version of Office, see Install Office on your PC or Mac. To troubleshoot Mac activation issues, see the "Activation" tab on What to try if you can't install or activate Office for Mac. If there's a Learn More link on the error message, select that.

Troubleshooter didn't help? Select from below:

To troubleshoot Mac activation issues, see the "Activation" section in What to try if you can't install or activate Office for Mac. Office up-to-date ensures that you have the latest security updates and fixes. If your admin has given you permission to install updates, see Install Office updates. For example, you can't install Office on computers running Windows Vista or Windows XP, or on devices that aren't running a supported Windows or Mac operating system. However, you may still be able to use Office Online in your computer's browser. In most cases you can do basic editing on most of these devices, however if you have a qualifying Office 365 subscription, you get access to the apps' extra features.

How do I manage licenses for people in my organization?

For more general (not admin specific) help in these areas, see the Additional help section on the Office for Business tab of this topic.To help you set up your organization, see Set up Office 365 for business – Admin Help.The easiest way to determine this is to take the document to a different computer running another copy of Microsoft Office and attempt to open the document there.A progress bar appears and shows progress while the repair happens.All comments containing links and certain keywords will be moderated before publication.If you're an admin and you aren't sure what plan you have, follow the steps in What Office 365 for business subscription do I have?

To add to the dock, drag the app icon from the Launchpad or the Applications folder. Keeping Office up-to-date ensures that you have the latest security updates Microsoft support alternatives and fixes. For information about installing updates, see Install Office updates. You might get an error that has a number and maybe some descriptive text. Although the messages are hard to understand, there are often solutions.

Install Office apps and set up email on a mobile device (iOS, Android, or Windows phone or tablet)

See the Browsers section on the system requirements page. The steps to access the repair tool vary depending on your operating system. I want comments to be valuable for everyone, including those who come later and take the time to read. Unfortunately, there’s no general-purpose Microsoft Office document repair tool. If your documents are the cause of the problem, hopefully you have backup copies that haven’t been damaged.

Office on a mobile device

When you install Office 365, all the applications that came with your particular Office product is installed at the same time. You can't custom select which Office applications you want to install or not install, nor you can't delete individual applications after your installation is complete. However, you can delete shortcuts to applications you don't plan to use. For download and installation issues on a Mac, see What to try if you can't install Office for Mac. When you install Office 2016, all the applications that came with your particular Office product are installed at the same time.

How do I repair Microsoft Office 365 installation?

Mac activation issues

Comments that don't add value will be removed, including off-topic or content-free comments, or comments that look even a little bit like spam. All comments containing links and certain keywords will be moderated before publication. The easiest way to determine this is to take the document to a different computer running another copy of Microsoft Office and attempt to open the document there. If it works, then it’s likely that your installation of Office is the problem, not the document. If it fails, it’s likely the document itself is at fault.