NSSecureTextFieldCell works with NSSecureTextField to provide a text field whose value is guarded from user examination. It overrides the general cell use of the field editor to provide its own field editor, which doesn’t display text or allow the user to cut or copy its value.
A Boolean that indicates whether the receiver echoes a bullet character rather than each character typed.
var echosBullets: Bool
@property BOOL echosBullets
Available in OS X v10.0 and later.