1. Sign in to your Apple Developer account and navigate to Certificates, IDs & Profiles -> Certificates
2. Click on the Plus Icon to create a new certificate
3. Under Software, select iOS Distribution
4. Click Continue
5. Create a certificate signing request
6. Upload a Certificate Signing Request
7. After the upload click Continue
8. Download your certificate to your Mac
9. Once the file is downloaded, double-click on it in Finder. This will open your Keychain Access app, and you will see that the certificate has been installed on your computer.
10. Right-click on the certificate and select Export.
11. You will be prompted to create a password to secure the file, we recommend you do so
12. Select the file format .p12
13. Select a folder where you collect this file and more files that will be created in the next steps
14. Enter the name distribution (Full name: distribution.p12)
15. Click Save
16. Keep the file and the password for sending it to Flip later

Next Step:

→ Register new Identifiers