Apple will be adding the Thunderbolt Display and the first-generation iPad Air to its obsolete products list worldwide on May 31, according to an internal memo obtained by MacRumors. Obsolete products are no longer eligible for repairs or other hardware service at Apple Stores or Apple Authorized Service Providers. Introduced in 2011, the Thunderbolt Display featured a 27-inch screen, a 1440p resolution, a 720p camera, three USB 2.0 ports, a FireWire 800 port, a Gigabit Ethernet port, and a Thunderbolt port. The monitor was priced at $999 in the U.S. and was discontinued in 2016, resulting in years without an Apple-branded external display. Its modern day successor is the Studio Display, released alongside the Mac Studio last year. The original…