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How to install Office LTSC on Macbook

Julian Hernandez 20 Reputation points
2026-04-29T02:48:10.6166667+00:00

I have the license key of Office 2021, and Im so new with MacOS, as I know, Apple does not provide Office officially on App Store, so how can I install it ?

Microsoft 365 and Office | Install, redeem, activate | For business | MacOS
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  1. Teddie-D 16,370 Reputation points Microsoft External Staff Moderator
    2026-04-29T03:30:19.78+00:00

    Hi @Julian Hernandez 

    Office LTSC 2021 can be installed on macOS, but it must be installed using the Microsoft PKG installer, not from the Mac App Store. 

    If Office apps were previously installed from the Mac App Store, they must be fully uninstalled first, as App Store Office is not compatible with LTSC licenses.

    You can follow these steps to install: 

    1.Check your macOS version  

    -According to Office 2021 and Office LTSC for Windows and Mac FAQ - Microsoft Support, Office LTSC 2021 for Mac supports the three most recent macOS versions supported by Microsoft. 

    -To check, please click the Apple icon in the top left corner of your screen > About This Mac > confirm your version (Sequoia, Sonoma, Ventura,...) 

    2.Download the Office 2021 for Mac installer (PKG) from Microsoft 

    You can get it from Microsoft Office activation and the Mac App Store - Microsoft Support. 

    3.Run the installer  

    -After download, double-click the .pkg file and follow the installation wizard 

    4.Activate Office LTSC 2021  

    -Activation is handled through your organization’s volume license (usually managed by IT).  

    -After installation, you can confirm the version by opening Word and checking Word > About Word, which should display Office LTSC 2021. 

    I hope this helps. 

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  2. AI answer

    2026-04-29T02:48:22.12+00:00

    Office LTSC/Office 2021 for Mac is not installed from the Mac App Store and cannot be activated there with a perpetual (one-time) license key. It must be installed using the Microsoft installers.

    Use one of these options:

    1. Remove any Mac App Store Office apps (if installed)
      1. Close Word, Excel, PowerPoint, and Outlook.
      2. Open Finder → Applications.
      3. Locate Word, Excel, PowerPoint, and Outlook.
      4. Control‑click each and choose Move to Trash.
    2. Install Office 2021 for Mac from Microsoft Use the full Office installer package that supports perpetual and volume licenses: (If the license is specifically for Office 2019 or 2016 instead, use the matching installer listed below.) Alternatively, these packages are also available if needed: Steps:
      1. Open a browser (for example, Safari).
      2. Go to the appropriate installer link above.
      3. Download the .pkg file.
      4. Open the downloaded package and follow the on‑screen steps to install Office.
    3. Activate Office with the Office 2021 key After installation completes:
      1. Open Word (or any Office app).
      2. When prompted, sign in with the Microsoft account associated with the Office 2021 license, or choose the option to enter a product key (depending on license type).
      3. Enter the Office 2021 product key and complete activation.

    Important notes:

    • Perpetual licenses such as Office LTSC for Mac 2021 or Office 2019 do not work with Office apps installed from the Mac App Store. Using the key with Mac App Store versions will put the apps into reduced functionality mode.
    • Always use the Microsoft-provided installer packages (not the Mac App Store) for Office LTSC/Office 2021 on Mac.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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