Yes, McDonald's can accept orders via Apple Pay.

McDonald's is the largest fast food chain, with about 40,000 branches almost all over the world. McDonald's allows their customers to pay online, take away and dine in by using Apple Pay.
Since 2014, McDonald's has been taking digital payments. Apple Pay is available on all Apple devices and is free for all Apple users. You can use it by setting Apple Pay on your Apple device by navigating to the Apple wallet and adding at least one debit or credit card.
Apple Pay is a contactless payment method that completes the payment process within a few seconds.
How to use Apple Pay at McDonald’s Restaurants?

You will see the Apple Pay symbol in most McDonald's restaurants on the NFC card reader or window which accepts Apple Pay. Here is a step-by-step guide:
Set up your Apple Pay account on your Apple devices, such as an iPhone or Apple Watch.
You must first add your credit or debit card to your Apple Wallet in order to do this. You may use Apple pay in a manner that is quite similar to using your actual card once you have added your card to your Apple wallet.
Simply hold your iPhone over the payment terminal after you have everything set up and are ready to pay using Apple Pay at a McDonald's location. The payment is taken out of your debit or credit account via NFC technology.
The payment reader will display a green check mark for successful transactions, and your iPhone will display a DONE symbol.
How to use Apple Pay on the McDonald’s App?
You can use Apple Pay on the McDonald's app to enjoy your Big Mac and yummy fries just by following these steps.
Using the McDonald's app, select the closest location.
Fill the shopping cart with the food you want to order.
Enter all necessary information, including the delivery time and address, before moving on to the payment screen.
Select "Apple Pay" as your method of payment.
The transaction is complete after the money is deducted from the credit or debit card account you added to your Apple wallet.
What are the fees associated with using Apple Pay at McDonald’s?

There are no fees associated with using Apple Pay at McDonald's. Apple Pay is free for all Apple users. McDonald's does not impose extra charges for using mobile wallets like Apple Pay.
A bank or credit card company may levy some fees on your Apple Pay transaction.
Which forms of payment are accepted at McDonald’s?
Visa, MasterCard, American Express, and Discover are accepted at McDonald's. A U.S. bank must be issued registered payment cards. Apple Pay will immediately appear as a payment option in the McDonald's app if you have an iOS device and your card is linked to your Apple Wallet.
FAQs
Q. Can you use Apple Pay in the drive-thru?
A. Yes, you can use Apple Pay in the drive-thru. But, you have to hand over your device to the cashier to reach the card reader physically to complete the payment.
Q. Can I pay with my phone at McDonald’s?
A. Yes, you can pay with your phone at McDonald's by the process of "Mobile Order and Pay." This method allows you to place an order and pay the bill from the McDonald's app.
Q. Where is Apple Pay accepted?
A. Apple Pay is accepted anywhere that involves contactless payments. It can be used at a wide range of places, from grocery stores to taxis to shopping sites.