How to Download, Install, and Activate Office 2021 Home & Business for Mac

Evolution of Microsoft Office Application IconsHow to Download, Install, and Activate Office 2021 Home & Business for Mac

Follow this guide to install and activate your Office 2021 Home & Business for Mac license. Your license is bound to your Microsoft account, so you can reinstall it later if needed on the same or a new machine.

✅ Before You Begin

  • You’ll need a Microsoft account

  • Internet connection is required

  • Your Office key is valid for one device only

⚠️ Important:

Only one version of Microsoft Office should be installed per device.
If your Mac already has another version of Office (2016, 2019, or another 2021 edition), it is strongly recommended to uninstall it before installing Office 2021 Home & Business.
This helps avoid conflicts, activation issues, or corrupted installations.

📦 Installation on Mac

1. Go to the official setup page:

👉 https://setup.office.com

2. Sign in with your Microsoft account

  • Use your existing account or create a new one

3. Enter your 25-character product key

  • Click Next to redeem it

  • Your Office license will now be linked to your Microsoft account

4. Download the macOS version

  • Click Install

5. Open the downloaded .pkg file

  • Follow the prompts in the installer

  • Drag the Office apps to your Applications folder if needed

🔐 Activate Office 2021 Home & Business for Mac

After installation:

  • Open any Office app (Word, Excel, Outlook, etc.)

  • Sign in using the same Microsoft account used to redeem your license

  • Office will automatically activate

✅ You’ll see:
“Office is licensed to: [your email]”

🔄 Reinstallation & Device Limit Info

Once redeemed, your license is permanently linked to your Microsoft account.

You can reinstall Office at any time by logging into:

👉 Services & Subscriptions

There, you’ll find:

  • Your Office 2021 Home & Business for Mac license

  • A download button to reinstall it

  • Activation will complete again when you sign in

⚠️ Important:

Office 2021 Home & Business for Mac can only be installed and activated on one device at a time.
To move it to a new device:

  • Uninstall it from the original Mac

  • Then install and activate it on the new one using the same Microsoft account

🧠 Troubleshooting Tips

  • Ensure you’re signed in to the correct Microsoft account

  • Restart the app if activation doesn’t apply immediately

  • Still need help? Contact our support below

🤝 We’re Here to Help

✅ Ready to Get Started?

If you don’t yet have your key, get a genuine Office 2021 Home & Business for Mac license:

🎯 Instant delivery, account-bound license, and expert support included.
👉 Buy Office 2021 Home & Business for Mac from Top Key Shop