Office 2021 Home & Business Download & Installation

Office 2021 Home & Business Download, Installation & Activation Guide (Mac)


Office 2021 Home & Business for Mac is ideal for families and small businesses who need the core productivity apps — including Outlook — with a one-time purchase. This version is tied to your Microsoft account, so you can reinstall it anytime on a new Mac after uninstalling from the old one.

This step-by-step guide will walk you through downloading, installing, and activating Office on your macOS device.


⚠️ Before You Begin


Only one version of Microsoft Office should be installed on a Mac at any time.

If you already have another version installed (Office 2016, 2019, or 365), uninstall it first to avoid conflicts.


ℹ️ System Requirements

Make sure your Mac meets the minimum system specs:

  • Operating System: macOS Mojave (10.14) through macOS Monterey (12)

  • Processor: Intel or Apple Silicon (M1/M2)

  • RAM: 4 GB minimum

  • Storage: 10 GB of available disk space

  • Display: 1280 × 800 resolution or higher

  • Internet: Required for activation and updates

  • Browser: Latest version of Safari, Chrome, or Firefox


ℹ️ Download Office 2021 Home & Business for Mac


  1. Go to: https://setup.office.com

  2. Sign in with your Microsoft account (create one if you don’t have one)

  3. Enter the 25-character license key you received after purchase

  4. Follow the prompts to associate the license with your account

  5. After redeeming the key, click “Install” to download the installer for macOS

✅ You can always re-download and re-install on the same or on a new machine your Office by signing into your Microsoft account and visiting: Service & Subscription Section. Only one active installation is allowed at a time. If you wish to install and activate Office on a new Mac, you must first uninstall it from the current device.


⚙️ Install Office 2021 Home & Business on Mac


  1. Open the downloaded .pkg file

  2. Follow the on-screen instructions in the Microsoft Installer

  3. Agree to the license terms and proceed with installation

  4. Wait for the setup to finish, then launch any Office app (like Word)


ℹ️ Activate Office 2021 on Your Mac


  1. Open Word, Excel, or any Office app

  2. When prompted, sign in with the Microsoft account you used during key redemption

  3. The app will activate automatically once you're signed in


ℹ️ Troubleshooting Activation Issues


  • Wrong Account?
    Ensure you're signed in with the same Microsoft account that the license was redeemed on

  • Old Version Still Installed?
    Completely remove previous Office versions using the Microsoft Office Removal Tool for Mac

  • No Activation Prompt?
    Go to Word > Preferences > Accounts and sign in manually

⚠️ Still having issues? Contact our support with your order number and a screenshot of any error message.


ℹ️ Need Help?


Our free 24/7 support team is ready to assist you:


✅ Ready to Get Started?


➤ Buy Office 2021 Home & Business for Mac at Buy Key Now and enjoy premium productivity tools with full offline functionality and no subscriptions.