How can I hide persistent Facetime audio call on macOS?
解决方案
Solved. Enable Do Not Disturb and the banner will disappear even when on the call.
You can enable Do Not Disturb from the Notification Center. You can access the Notification Center by clicking the Notification Center icon at the top right of the screen. Or by sliding two fingers on the trackpad, from right to left but starting from the outside of the trackpad.
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