Step by Step Instructions How to Download and Install or Reinstall Office 365 or Office 2016 on Mac

Please make sure your computer meets system requirements before you begin. Office 365 is designed to work best with Office 2016, Office 2013, and Office 2016 for Mac. Previous versions of Office, such as Office 2010, Office 2007, and Office for Mac 2011 may work with Office 365 with reduced functionality. An internet connection is required in order to access, download, install, or activate Office.

Office for home: Note that some Office for home products come with a product key. If you have a key, sign in at with an existing Microsoft account or create a new Microsoft Account. Enter your product key.

Office for business: If your Office for business subscription plan includes the desktop version of Office and your company allows you to install it, you will need an assigned license.

STEP 1 - Sign in and download Office

How to Install Office on a Mac

  1. Go to and select Sign in.

  2. Sign in with the associated account for this version of Office. The account can be a Microsoft account, a work account, or school account. If you don’t remember your sign-in details see “I forgot the account I use with Office”.

  3. On the Office home page, do one of the the following, depending on which version of Office you are installing.

If you signed in with a Microsoft account, from the Office home page select Install Office > Install. (Office 365 subscribers should select Install again).

Office apps

If you signed in with a company or school account, from the Office 365 home page select Install Office apps > Office 2016. (If you designated a different start page, go to

Office apps

This will begin the Office download. Follow the instructions onscreen to complete installation.

If you don’t see an install option after signing in, there could be an issue with your account. Select Need help? and review Account questions.

STEP 2 - Install Office

  1. When the download is complete, open Finder, go to Downloads, and double-click the Microsoft_Office_2016_Installer.pkg

    MS office 2016 installer

    TIP: If you see the error message: “Microsoft_Office_2016_Installer.pkg can't be opened because it is from an unidentified developer,” wait 10 seconds and try double-clicking the installer package again.

  2. Select Continue on the first installation screen to continue installation.

    MS office 2016 installer for Mac
  3. Read the software license agreement and click Continue.

  4. Select Agree to agree to the terms of the software license agreement.

  5. Choose installation option and click Continue.

  6. Review disk space requirements or change install location, then click Install.

    NOTE: If you want to install specific Office apps and not the entire suite, click Customize and uncheck the programs you don't want to install.

  7. Enter your Mac login password when prompted and click Install Software. Your password is the password you use to log into your Mac.

    Mac login password prompt window
  8. Software will install. Click Close when installation finishes. If installation fails, see What to try if you can’t install or activate Office 2016 for Mac.

    Installation was complited successfully window

STEP 3 - Launch an Office for Mac app and start the installation process

  1. Click the Launchpad icon in the Dock to display your apps.

  2. Click Microsoft Word icon in the Launchpad.

    Launch office apps for Mac
  3. The What’s New window will open automatically when you launch Word. Click Get Started to activate. For help activating Office, see Activate Office 2016 for Mac. If Office activation fails, see What to try if you can’t install or activate Office 2016 for Mac using Office 365 for business.

    What's New window

Installation Notes

Can I install Office 2016 for Mac and Office for Mac 2011 on the same computer?

You can install and use Office 2016 for Mac and Office for Mac 2011 at the same time, but we recommend uninstalling Office for Mac 2011 before installing the new version. Uninstall Office for Mac 2011 with the steps in Uninstall Office 2011 for Mac.