macOS support

in your macos/runner/info.plist folder you must add

<key>com.apple.security.network.server</key>
<true/>

Now in xcode select the Runner target and go to Signing & Capabilities and enable Outgoing Connections

Unlinke ios, android and web for desktop apps the facebook session data is not stored by default. In that case this plugin uses flutter_secure_storage to secure store the session data.

To use flutter_secure_storage on macOS you need to add the Keychain Sharing capability

Finally in your main.dart you need to initialize this plugin to be available for macOS

import 'package:flutter/foundation.dart' show defaultTargetPlatform;

void main() async {
  if (defaultTargetPlatform == TargetPlatform.macOS) {
    await FacebookAuth.i.webAndDesktopInitialize(
      appId: "1329834907365798",
      cookie: true,
      xfbml: true,
      version: "v14.0",
    );
  }
  runApp(MyApp());
}

If your app also support web you must use the next code instead of above code

import 'package:flutter/foundation.dart' show defaultTargetPlatform, kIsWeb;

void main() async {
  if (kIsWeb || defaultTargetPlatform == TargetPlatform.macOS) {
    await FacebookAuth.i.webAndDesktopInitialize(
      appId: "YOUR_APP_ID",
      cookie: true,
      xfbml: true,
      version: "v14.0",
    );
  }
  runApp(MyApp());
}

Now in your facebook console > Facebook Login > Settings and make sure you have enabled Login from Devices , Login with the JavaScript SDK and finally check that https://www.facebook.com/ is added in your Allowed Domains for the JavaScript SDK

Here one example of my configuration in the facebook console to be able to use the facebook login flow in macOS

::: NOTE (macOS): keep in mind that this plugin uses the oauth flow facebook login and in some cases if the graph api doesn't return a long_lived_token the token stored in the keychain will have a sort live time (80 minutes or less). :::