VAT refund when exporting new MacBook outside of EU

I live outside the EU and plan to travel to Germany in a few weeks. I am going to buy a MacBook online and receive it in Germany.

Here I had read: Zahlung & MwSt. - Einkaufshilfe - Apple (DE)

> Reimbursement of VAT on exports

> Customers who purchased Apple products in Germany and had them

> delivered to an address in Germany can receive a VAT refund on

> exports of Apple computers.

My question: should I request any specific documents, such as VAT export form for customs during the ordering, and how to do that? For sales related questions Apple only suggests using a phone number in Germany that is not reachable from outside.