nsfontmanager_convert_family.swift

dynamic let fontFamilyNames = NSFontManager.sharedFontManager().availableFontFamilies

fontFamilyName!.bind("content", toObject: self, withKeyPath: "fontFamilyNames", options: nil)

@IBAction func fontFamilyChanged(sender: NSPopUpButton) {
	let newIDX = sender.indexOfSelectedItem
	if var font = textView?.typingAttributes[NSFontAttributeName] as? NSFont {
		font = NSFontManager.sharedFontManager().convertFont(font, toFamily: fontFamilyNames[newIDX])
		applyNewAttributes([NSFontAttributeName: font])
	}
}