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ClearMyMac 3 install and fix the errors

Error

Download a DMG file, copying it into /Applications/, right clicking on it and selecting Open now causes following error:
"ClearMyMac 3.app" is damaged and can't be opened. You should move it to the Trash.

Fix

  1. Go to termin iTerm
  2. cd /Applications/Utilities/Terminal.app:
  3. /Applications/Utilities/Terminal.app$:  sudo xattr -r -d com.apple.quarantine /Applications/CleanMyMac\ 3.app/
  4. Open ClearMyMac 3.app again. Enjoin!
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