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. You can also swipe left on the call (in the list of calls) using two fingers on the trackpad (use one finger on a Magic Mouse), then click the Delete button
Remove all recent calls: Choose FaceTime > Remove All Recent.
Important: Recent calls are cleared from both the All and Missed panes.