OSX 10.12上的NSOpenPanel Swift警告消息

Question

最近升级到macOS Sierra版本10.12，Xcode版本8.2.1

以下代码适用于OS Sierra，但带有警告消息。它适用于之前的操作系统El Capitan 10.11而没有警告信息。

任何人都可以建议如何撕掉这条警告信息？

warning: <NSRemoteView: 0x618000123200> determined it was necessary to configure <NSVBOpenPanel: 0x102e816d0> to support remote view vibrancy

我的代码如下：

@IBAction func btnChooseFile(_ sender: Any)
    {
        let dialog = NSOpenPanel()
        dialog.title                   = "Choose a project file"
        dialog.showsResizeIndicator    = true
        dialog.showsHiddenFiles        = false
        dialog.canChooseDirectories    = false
        dialog.canCreateDirectories    = false
        dialog.allowsMultipleSelection = false
        dialog.allowedFileTypes        = ["txt"]

        if (dialog.runModal() == NSModalResponseOK) {
            let result = dialog.url // Pathname of the file
            if (result != nil) {
                let path = result!.path
                txtProject.stringValue = path
            }else{
                // Display error message
            }
        } else {
            return
        }
    }