anchor.diff:  
   function TATTabs.RealTabAngle: Integer;
   begin
  +  {$ifdef darwin}
  +  //macOS paints angled tab bad
  +  exit(0);
  +  {$endif}
  +
     if FTabList.Count>FTabAngleMaxTabs then
       Result:= 0
     else
  
positive.code:   FColorArrowOver:= $E0E0E0;
  
    FTabBottom:= false;
    FTabAngle:= {$ifdef darwin} 0 {$else} 5 {$endif};
    FTabAngleMaxTabs:= 10;
    FTabHeight:= 24;
    FTabWidthMin:= 20;
  
negative.code: 
  procedure TATTabs.SetTabAngle(AValue: Integer);
  begin
    if FTabAngle=AValue then Exit;
    FTabAngle:= AValue;
  end;
  