macOS push certificates include push certificate for the development environment and push certificate for the release environment.
According to this tutorial, create a push certificate for the development environment and a push certificate for the release environment.
Directions
Generating certificate
1. On your computer, open the Keychain Access tool and select Request a Certificate From a Certificate Authority.
2. Enter your email address, leave other fields empty, and click Continue to save the certificate locally.
3. Log in to the Apple Developer website and click Certificates, Identifiers & Profiles.
4. Select the application that needs a message push certificate and check the message push service.
Create a message push certificate
The following is a demonstration of creating a push certificate for the development environment. The steps for creating a certificate for the release environment are basically the same.
Go to the Certificate column and click "Add".
Here, create a push certificate for the development environment as an example.
Then, select the message push certificate request file created in step 2, upload it, and click ``Continue``.
Finally, download the generated message push certificate to the local system.
Step 4. Install the certificate
Double-click the certificate downloaded in the previous step to automatically install the certificate to the Keychain application.
Step 5. Export the certificate
Open Keychain Access, select the message push certificate to be exported and right-click it. Select Export Certificate with the export format P12, then set the password.
