Forum Discussion
MS Defender 101.25102 update error
I have been trying to update MS Defender for several days now and without luck. I am on a iMac M3 with macOS 26.1. I tried removing and reinstalling the app, but it seems that the uninstall script d...
Yup - it has to do with tamper protection. Known issue on this version.
You'd need to disable tamper protection and then the update goes through without issue. Then you an re-enable it: https://learn.microsoft.com/en-us/defender-endpoint/tamperprotection-macos#manual-configuration