Excel won't save files as of three days ago after I restarted my computer.

Jeffrey Hagerty 5 Reputation points
2026-08-06T16:59:08.35+00:00

I purchased a lifetime Microsoft Office in 2022 with my new Macbook Air and after I restarted my computer three days ago it will no longer save files and stated I need to buy Windows 365.

Microsoft 365 and Office | Excel | For home | MacOS
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  1. DaveM121 914.5K Reputation points Independent Advisor
    2026-08-06T17:37:51.0333333+00:00

    There are a couple of widely reported problems with the Office apps on an Apple Mac at the moment due to the July 13 update

    1

    What version of Microsoft Office do you have, is that a standalone version of Office like Office 2019, 2021 or 2024.

    2

    At the top left of your Desktop, click the Apple icon and select 'About this Mac', what version of MacOS is installed on your computer?

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  2. AI answer

    2026-08-06T16:59:27.5133333+00:00

    This usually means Office is running in reduced functionality mode or the wrong Office/license state is being used, which disables editing and saving.

    For a Mac with a one-time purchase from 2022, use this order:

    1. Check the macOS version.
      • Office on Mac now requires at least macOS 12 for the current supported update path.
    2. Update Office.
      • Close all Office apps.
      • Open Microsoft AutoUpdate from Finder > Applications > Microsoft AutoUpdate.
      • Install all available updates.
      • If Office was installed from the App Store instead, open App Store > Updates and update the Office apps there.
      • Then open Excel and test saving again.
    3. If Excel still will not save, sign out and sign back in.
      • Quit Excel completely with Command + Q.
      • Open Excel again.
      • Go to the app’s Account settings, sign out, then sign in again with the Microsoft account tied to the Office purchase.
      • This is specifically recommended if Office 2021 for Mac still will not let files be edited or saved after updating.
    4. If the app shows Unknown Error 0x0 or License Not Found, update first and retest.
      • Microsoft marked that issue as resolved, and the documented fix is to update Office on macOS 12 or later.
    5. If the problem is only with files stored in OneDrive and AutoSave is off:
      • AutoSave works only when the file is saved to OneDrive, OneDrive for Business, or SharePoint Online.
      • If the file is local, on a file server, or OneDrive sync is paused, AutoSave is disabled.
      • On Mac, open the file from File > Open inside Excel, and if needed choose Online Locations to open the OneDrive copy.
    6. If saving fails with a disk-related error, update Office first.
      • Microsoft’s documented first fix for serious disk errors in Office for Mac is to install the latest Office update.
    7. If Office apps can open and print files but cannot edit, save, or create new files, update both macOS and Office.
      • Microsoft states this reduced functionality behavior can occur on unsupported older operating systems or devices.

    Expected result:

    • After updating Office and signing in again with the correct Microsoft account, Excel should return to full editing and saving.
    AI-generated content may be incorrect. Read our transparency notes for more information.

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