Apple will begin accepting trade-ins of three new Mac models on June 5, the day of Apple's WWDC 2023 keynote event, according to Bloomberg's Mark Gurman. In a tweet shared earlier today, Gurman said that the Mac Studio, 13-inch M2 MacBook Air, and 13-inch M2 MacBook Pro, will become eligible for trade-in with Apple on Monday, June 5. Gurman is expecting new Mac hardware to be unveiled during Apple's keynote on June 5, including an all-new 15-inch MacBook Air model. "Read into that as you will," he added. Apple introduced the Mac Studio in May 2022, offering M1 Max and M1 Ultra chip configurations. Despite the launch of a range of Macs with the M2, M2 Pro, and M2 Max…