解决方法
一种方法,在NSTableViewDelegate的viewForTableColumn -function中：
if tableColumn!.identifier == "description" {
let cell = NSTableHeaderCell()
cell.title = "New Title"
cell.backgroundColor = NSColor.redColor()
cell.drawsBackground = true
cell.bordered = false
cell.font = NSFont(name: "Helvetica",size: 16)
tableColumn!.headerCell = cell
}
