Check out the exclusive Apple merchandise you can only buy once a year

Official Apple t-shirts are hard to find.

For people who aren't employees, there's usually only one place to buy them or other official Apple swag: the company's headquarters at 1 Infinite Loop.

But once a year there's an exception to that rule. Every year at WWDC, the company's conference for software developers, Apple sets up a company store where attendees can buy Apple merchandise.

On the first two days of this year's WWDC, the pop-up outlet did brisk business as Apple fans and developers waited in line to buy exclusive Apple swag.

I went by and checked it out. Here's some of the Apple merchandise you could snag.