gistfile1.swift

extension NSImage {
    class func imageNamed(name: String, inBundle bundle: NSBundle?) -> NSImage? {
        var image = NSImage(named: name)
        
        if let image = image {
            return image
        }
        
        image = bundle?.imageForResource(name)
        
        if let image = image {
            image.setName(name)
            return image
        }
        
        return nil
    }
}