When updating macOS we see: "Software Update is trying to authenticate user. Enter password to allow this." After entering in the password, the box shakes.
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This is a known Apple behavior and the only workaround for this is the load into recovery mode and reinstall macOS for the device.
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Intel - https://support.apple.com/en-us/HT208496
Apple Silicon - https://support.apple.com/en-us/HT212030 (revive/restore/DFU)

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