Generating your own Safari Push Notification Certificate
1. Create Certificate Signing Request
1.1 Open Keychain Access on your Mac (it is located in Applications/Utilities) and choose the menu option Request a Certificate from a Certificate Authority….
1.2 Save Certificate
You should now see the following window (pic. 1).
Enter your email address here. Some people recommend using the same email address that you used to sign up for the iOS Developer Program, but it seems to accept any email address just fine.
Check Saved to disk and click Continue.
2.1 Press "plus" button on the Website Push IDs.
2.3 On the next pages press Register and the Done buttons.
2.6 Press "Choose File..", select the "certSigningRequest" file you saved in Step 1, open, and then press "Generate".
3.1 Open the website_aps_production.cer file you downloaded in the last step by double clicking on it in Finder.
3.2 After a few seconds the "Keychain Access" program should pop up. Select Login > Keys, then right click on your key in the list and select "Export"
3.3 Give name the .p12 file the same as sertificate ID (example: "web.net.0000001.gravitec"). You will have an option to protect the file with a password. Generating safari ID set the password: 1111
4. Send your p12 file to Gravitec support (firstname.lastname@example.org)