Product Key Issues

How to Fix Office 2016 Activation Issues on a New MacBook

Maira Mehtab Sep 21, 2026 869 views

Question details

The user is unable to activate a boxed purchase of Microsoft Office 2016 on a new MacBook because the original product key produces an error, and no associated license appears in their Microsoft account.

Product: Microsoft Office 2016
Device & OS: macOS (MacBook)
Scenario: Transferring and activating a previously purchased Office 2016 license onto a newly purchased MacBook.
Observed behavior: Entering the product key at the setup page produces an error message, and checking the Microsoft account reveals no active Office license available for installation.

Before you start

Ensure you have your original Office 2016 product key box or receipt handy, and verify that you are signing in with the exact Microsoft account originally used to set up the software.

Solution 1Recommended

Deactivate Old Installation and Install from Microsoft Account

If your Office 2016 key was previously redeemed, it is permanently linked to your Microsoft account. You must deactivate the old Mac installation before activating it on the new one.

Product keys for Office 2016 can only be redeemed once. After the initial setup, the key is tied to your Microsoft account. Entering it again on a new device will result in an error.

Sign in to your Microsoft Account

Open your web browser and navigate to https://office.com/myaccount. Sign in using the exact Microsoft account associated with your original Office 2016 purchase.

Deactivate the old installation

Locate your Office 2016 installation under the 'Installs' or 'Services & subscriptions' section, and select 'Deactivate Install' to release the license from your old MacBook.

Uninstall Microsoft 365 trials

On your new MacBook, go to the Applications folder and uninstall any pre-installed Microsoft 365 trial applications, as these can cause activation conflicts with Office 2016.

Install Office 2016 on the new Mac

Return to your Microsoft account page and click 'Install' to download the Office 2016 installer. Run the installer and sign in to activate the software automatically without needing the product key.

Account Verification: If you do not see your Office license in the account, you may have used a different email address during the initial setup. Try logging in with other personal email accounts you own.

Solution 2

Contact Microsoft Support for Unlinked Product Keys

Use this method if your boxed product key was genuinely never linked to a Microsoft account when originally purchased, and it is producing an error at setup.

Free Microsoft Office alternative

Switch to WPS Office for Mac – No Activation Hassles

If you cannot recover your older Office 2016 license or simply want to avoid purchasing an expensive new subscription, WPS Office provides a completely free, lightweight, and highly compatible alternative for your new MacBook.

1. Download the Installer: Visit the official WPS Office website and download the free macOS installation package.
2. Install the Application: Open the downloaded file and drag the WPS Office icon into your Applications folder.
3. Start Creating: Launch WPS Office from your Launchpad and immediately start viewing and editing your documents without any product key restrictions.

Free to download and use on macOS without mandatory subscriptions or activation keys.Fully compatible with Microsoft Office formats, ensuring DOCX, XLSX, and PPTX files open seamlessly.Lightweight installation that runs incredibly smoothly on modern MacBooks and Apple Silicon.Familiar user interface makes migrating from older versions of Microsoft Office effortless.

Frequently Asked Questions

Why does office.com/setup say my Office 2016 product key has already been used?

This error occurs because Office 2016 product keys are one-time use only. Once you redeem the key, the license is permanently attached to your Microsoft account. You must reinstall the software directly from your account page rather than reusing the key.

Can I have Office 2016 installed on both my old and new MacBook?

No. A standard Office 2016 license allows installation on only one computer at a time. You must deactivate the license on your old Mac before it can be successfully activated on your new one.

How do I completely remove a pre-installed Microsoft 365 trial on my new Mac?

Open Finder, navigate to the Applications folder, and locate the Microsoft Word, Excel, PowerPoint, and Outlook apps. Drag them to the Trash, and then empty the Trash. This ensures the trial version does not interfere with your Office 2016 activation.

Installation & Activation