Push notification not work

all this tutorial https://docs.ionic.io/services/push/ from Summary to sending pushes .
Here is my ionic info: global packages:

@ionic/cli-utils : 1.4.0
Cordova CLI      : not installed
Ionic CLI        : 3.4.0

local packages:

@ionic/app-scripts              : 1.1.4
@ionic/cli-plugin-cordova       : 1.4.0
@ionic/cli-plugin-ionic-angular : 1.3.1
Cordova Platforms               : none
Ionic Framework                 : ionic-angular 2.2.0

System:

Node       : v6.9.1
OS         : OS X El Capitan
Xcode      : Xcode 7.3.1 Build version 7D1014
ios-deploy : not installed
ios-sim    : 5.0.8
npm        : 3.10.8