Apple will refresh its MacBook Air line of computers on July 19th, iClarified reported on Wednesday. We began to suspect the update was imminent when early reports suggested that global supplies for the computer were in short supply in late May. Those reports were solidified earlier this week when stock of the MacBook Air at Best Buy and Amazon was depleted. The device is expected to pack the new Thunderbolt I/O port in place of DisplayPort, Intel’s new Sandy Bridge processors, and the brand new OS X Lion operating system. 9to5 Mac said that Apple will likely offer Intel’s 1.8GHz Intel Core i7, 1.7GHz Core i7, and the 1.7GHz Core i5 in its new machines. We love the current design of the MacBook Air, and rumor has it that there won’t be any hardware tweaks. We suppose that could mean the rumored anodized black version will never see the light of day. The good news is the long wait is nearly over.