How do I override layout of NSTableHeaderView?

Question

I am trying to produce a custom header for my NSTableView. I would like to change the font of the header text and remove the borders and vertical separators.

My curr

Answer 1

The above answers works also directly you can use in viewDidLoad

override func viewDidLoad() {
        super.viewDidLoad()   
        tableView.tableColumns.forEach { (column) in
                column.headerCell.backgroundColor = NSColor.white
                column.headerCell.drawsBackground = true
                column.headerCell.isBordered = false
                column.headerCell.attributedStringValue = NSAttributedString(string: column.title, attributes: [NSAttributedString.Key.font: NSFont.systemFont(ofSize: 13)])
              }
}