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Yassin Koleilat's avatar
Yassin Koleilat
Brass Contributor
Aug 29, 2025
Solved

MS Defender - Installation Error version 101.25072 on macOS

Dear experts, The latest version of MS Defender can't be installed. I'm getting an error message since release date (5th Aug). I have tested to restart the computer, tested with different networks, ...
  • BrandonJ365's avatar
    BrandonJ365
    Sep 08, 2025

    FYI...MS has this posted on their service health status page.  They have a fix in the works but sounds like it will be a "side channel" upgrade of some kind.  I'm betting we'll be having to push a shell script via MDM that will end up doing a "rip and replace" of sorts.

    https://admin.cloud.microsoft/?#/servicehealth/:/alerts/DZ1144032

vebhoy's avatar
vebhoy
Copper Contributor
Sep 01, 2025

Same issue here on M1 Mac.

Logs from AutoUpdate states that it fails due to "Invalid Hash" after download:

2025-09-01 13:15:19 [Microsoft Update Assistant] <Info> DownloadTask.DownloadBegin: {"UpdatePkg":"wdav-upgrade.pkg","UpdateID":"CFB7EF38-C76F-4EE6-8ED4-96567A5B0435","ExceedsChainedSize":"NO","IsSilent":"NO","PreviousUpdateID":"","AppID":"WDAV00","BundleVersion":"101.25062.0004","UpdateVersion":"101.25072.0010","LatestOnOfferBlocked":"NO"}
2025-09-01 13:15:19 [Microsoft Update Assistant] <Info> NOT.COLLECTED: {"Payload":"Downloading. URL: https://officecdnmac.microsoft.com/pr/1ac37578-5a24-40fb-892e-b89d85b6dfaa/MacAutoupdate/wdav-upgrade.pkg"}
2025-09-01 13:15:33 [Microsoft Update Assistant] <Info> NOT.COLLECTED: {"Payload":"Fetching file Success. File: https://officecdnmac.microsoft.com/pr/1ac37578-5a24-40fb-892e-b89d85b6dfaa/MacAutoupdate/wdav-upgrade.pkg"}
2025-09-01 13:15:33 [Microsoft Update Assistant] <Error> ErrorsAndWarnings: {"Error":"Invalid Hash","File":"wdav-upgrade.pkg","Operation":"Download","AppID":"WDAV00"}
2025-09-01 13:15:33 [Microsoft Update Assistant] <Info> ErrorsAndWarnings: {"Error":"Failed to download https://officecdnmac.microsoft.com/pr/1ac37578-5a24-40fb-892e-b89d85b6dfaa/MacAutoupdate/wdav-upgrade.pkg. Reason: 'Error Domain=com.microsoft.autoupdate Code=501 \"(null)\"'","Operation":"Download"}
2025-09-01 13:15:33 [Microsoft Update Assistant] <Warning> ErrorsAndWarnings: {"Error":"Failed. Msg: {\n    DownloadURL = \"officecdnmac.microsoft.com/pr/1ac37578-5a24-40fb-892e-b89d85b6dfaa/MacAutoupdate/wdav-upgrade.pkg\";\n    ErrorCode = 501;\n    ErrorDomain = \"com.microsoft.autoupdate\";\n}","UpdateID":"CFB7EF38-C76F-4EE6-8ED4-96567A5B0435","Operation":"Download","AppID":"WDAV00"}
2025-09-01 13:15:33 [Microsoft Update Assistant] <Info> NOT.COLLECTED: {"Payload":"Updating Application State for App: WDAV00 to: 9 info: Sorry, there's a problem with the downloaded file, so you can't update now. Please try again later."}
2025-09-01 13:15:33 [Microsoft AutoUpdate] <Info> NOT.COLLECTED: {"Payload":"Updater state changed: 2"}



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