1. Login into Developer.apple.com
2. Click Certificates, Identifiers & Profiles
3. Select Identifiers
4. Select your app
5.Scroll down to Push Notifications
6. Click Create Certificate for Development SSL Certificate
5.Download the CSR file provided here onto your desktop (CSR file)
Select the file after download and press continue.
7. Click " All Certificates" to go back.
Select your app
8 .Scroll down to Push Notifications, click edit.
9.Select create under Production SSL Certificate
10. Upload the file that was previously downloaded to your computer by clicking " choose file".
11. Select Continue.