To celebrate the Big Mac burger turning 50, McDonald's is giving away free Big Macs. Yes, you read that correctly, but there's a catch. You'll need to a MacCoin, their new currency, to claim your free burger.
In honor of each decade the Big Mac has been around, the company created five different MacCoins. According to Yahoo.com, a limited supply of the coins will be available starting Thursday at 14,000 participating locations. You can redeem a MacCoin for one free Big Mac.
McDonald's noted that the coins are valid through the end of the year so you can enjoy your free burger next week or three months from now.