Install the last security update for Office 2011 – Office 14.7.7 update.If you’re going to continue using Office 2011 make sure you do the following: Although initial reports suggest Office 2011 works just fine on macOS 10.13, a future Apple macOS update or upgrade could render Office 2011 unusable and there would be no update to fix that. Microsoft has officially stated that they have not tested and will not test/support Office 2011 on macOS 10.13 High Sierra or later. Upgrade to Office 2016 – as long as you are running OS X 10.10 Yosemite or later.Remove Office 2011 and install/use non-Microsoft Office software that is kept up-to-date.Continue to use Office 2011 and try to reduce the security risk.So, the bottom line is that by continuing to use Office 2011, you have an ever-increasing security risk to you, your computer and your data. And Microsoft Office itself is an attack vector for the bad guys – they can create malicious files that can crash your Office software and then run code on your computer which has the potential to take it over or install very bad things on it. You may shrug your shoulders and (falsely) think “Hey, Macs don’t get viruses and are therefore secure, so what?” This is not true – Macs are not secure there still isn’t a Mac “virus”, but there are many other forms of attack. Office 2011 will become insecure as Microsoft no longer provides important security updates for the suite. In fact, it’ll probably continue working for a while into the future.

Microsoft Office 2011 isn’t going to stop working overnight. So, if you’re still running Office 2011 you probably should be asking yourself the question, “What should I do?”. That means no updates or bug fixes, and if anything goes wrong or stops working in Word, Excel, Powerpoint, or Outlook, you’re on your own. Microsoft is no longer offering any support for Office for Mac 2011.

Office 365 mac updates