No recibo las notificaciones Push de Ionic Push

Ionic Framework ionic-v3
1 
import { Component, ViewChild } from '@angular/core';
import { Nav, Platform } from 'ionic-angular';
import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';

import { HomePage } from '../pages/home/home';
import { ListPage } from '../pages/list/list';
import { CloudSettings, CloudModule } from '@ionic/cloud-angular';
import { Push, PushToken } from '@ionic/cloud-angular';

@Component({
  templateUrl: 'app.html'
})
export class MyApp {
  @ViewChild(Nav) nav: Nav;

  rootPage: any = HomePage;

  pages: Array<{title: string, component: any}>;

  constructor(public platform: Platform,
              public statusBar: StatusBar,
              public splashScreen: SplashScreen,
              public push: Push
  ) {
    this.initializeApp();

    // used for an example of ngFor and navigation
    this.pages = [
      { title: 'Home', component: HomePage },
      { title: 'List', component: ListPage }
    ];

  }

  initializeApp() {
    this.platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.
      this.statusBar.styleDefault();
      this.splashScreen.hide();
      this.register();
    });
  }

  openPage(page) {
    // Reset the content nav to have just this page
    // we wouldn't want the back button to show in this scenario
    this.nav.setRoot(page.component);
  }
register(){
  this.push.register().then((t: PushToken) => {
    return this.push.saveToken(t);
  }).then((t: PushToken) => {
    console.log('Token saved:', t.token);
  });
  this.push.rx.notification()
      .subscribe((msg) => {
        alert(msg.title + ': ' + msg.text);
      });

}

}

IONIC FRAMEWORK: 3.3.0
IONIC APP SCRIPTS: 1.3.7
ANGULAR CORE: 4.1.2
ANGULAR COMPILER CLI: 4.1.2
NODE: 7.10.0
OS PLATFORM: MACOS SIERRA
NAVIGATOR PLATFORM: MACINTEL
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