A help document reveals how the payment option works:
When you place an order with PayPal you will be redirected to the PayPal website. There you will then need to login with your PayPal username and password. Before sending the order, whether the total amount and billing details are correct.
If you are not a PayPal customer, you can still choose this payment option, then set up a new account or pay as a guest.
Your order consists of multiple deliveries, your PayPal account will be charged separately for each shipment.
While Paypal is not currently an option in any other stores, the move suggests Apple could be planning to bring the payment option to other countries as well.
Earlier today Apple revamped its online store with a stronger focus on images.
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