Certificate Signing Request (CSR)

If you do not have a Distribution Certificate yet, you must first create a Certificate Signing Request.

For this you will need a MAC.

https://help.apple.com/developer-account/#/devbfa00fef7help.apple.com

1. Launch Keychain Access located in /Applications/Utilities.

2. Choose Keychain Access > Certificate Assistant > Request a Certificate from a Certificate Authority.

3. In the Certificate Assistant dialog, enter an email address in the User Email Address field.

4. In the Common Name field, enter a name for the key.

5. Leave the CA Email Address field empty.

6. Choose “Saved to disk”, and click Continue.