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Delete the call history in FaceTime on Mac
You can clear a specific call or all calls from the list of calls you made or received.
In the FaceTime app
on your Mac, click All or Missed.
Do one of the following:
Remove a specific call: Control-click a call, then choose Remove from Recents.
Remove all recent calls: Choose FaceTime > Remove all Recents.
Recent calls are cleared from both the All and Missed panes.