Using WebKit to show HTML in macOS - Blank View

Need to show HTML pages within app using WebView in WebKit framework.

This code should do it, but only get a blank white screen, no error messages. Thanks for any help of alternate solutions.

@property (weak) IBOutlet WKWebView *webView;

NSURL * myURL = [NSURL  URLWithString:@"http://www.jzmobile.com"];
[_webView loadFileURL:myURL allowingReadAccessToURL:myURL];
[_webView.navigationDelegate self];