If you're buying anything from any Apple Store, Apple.com or the App Store in the US, you may want to consider paying with the company's mobile wallet. For every Apple Pay transaction at its official outlets, Cupertino will donate $1 to the National Park Foundation. Sure, that's a such a tiny fraction of a MacBook Pro's retail price, but if you're buying one anyway, might as well help preserve America's National Parks. The foundation will use your contribution for conservation projects and other initiatives, including programs encouraging the youth to help with its efforts.
In a statement released by the company, Apple chief Tim Cook said "America's national parks are an inspiration to [them] at Apple." He added that the their "goal is to leave the world better than [they] found it, so this July [they're] making it easier for anyone to help preserve the beauty of our natural, cultural and historical treasures." Considering Apple named the 11th OS X "Yosemite," we think it's only right that the company is trying to give back.
You can participate in the event whatever version of Apple Pay you use, whether you pay via iPhone, Apple Watch or a MacBook running Sierra. However, Cupertino will only donate $1 on your behalf if you make your purchase from July 1st until the 15th.