Step 1. Download the certificate we sent you via email or chat. Ex: apple_pay_example.cer
Step 2. Visit your Shopify Mobile Apps settings: https://shopify.com/admin/apps/mobile_app
OR In the left sidebar, click on Mobile App
Step 4. In the Apple Pay section, click Enable.
Step 5. Click the Next button twice — the pop-up title should now say “Upload your Apple certificate”:
Step 6. Click Upload certificate button and upload the .CER file we sent you. Ex: apple_pay_example.cer
Step 7. Once this is complete, your Apple Pay section should now display your MERCHANT ID. Your Apple Pay is now fully set-up and ready for live purchases.
Note: To ensure that your Apple Pay is set up correctly, we recommend making a purchase using Apple Pay on your app once it is live.