Step 1. Go to your My Account page at Office.com and sign in with your Microsoft account.
Step 2. On the My Account page, under the name of your subscription, select Install.
Step 3. On the next page, under Install information, select Install to begin downloading the installation package.
Step 4. Once the download has completed, open Finder, go to Downloads, and double-click Microsoft_Office_2016_Installer.pkg (the name might vary slightly).
TIP: If you see an error that the Microsoft_Office_2016_Installer.pkg can’t be opened because it is from an unidentified developer, wait 10 seconds and then try double-clicking the installer package again.
Step 5. On the first installation screen, select Continue to begin the installation process.
Step 6.Review the software license agreement, and then click Continue.
Step 7.Select Agree to agree to the terms of the software license agreement.
Step 8.Review the disk space requirements, and then click Install.
Step 9.Enter your Mac login password, if prompted, and then click Install Software. (This is the password that you use to log in to your Mac.)