You'll need to be signed in to the same iCloud account on your iPhone, iPad, Mac, or Apple Watch. Your Mac needs to have Bluetooth on. Then:
- 1. Tap the "Buy with Apple Pay" or "Apple Pay" button
- 2. Verify the information and card that's being used
To make the purchase, place your finger on Touch ID on your iPhone or double-click the side button on your Apple Watch, and you're done.