when was the latest macbook pro retina released
MacBook Pro Apple released the third generation of MacBook Pro with a 15-inch screen during WWDC 2012 and discontinued the 17-inch variant. The previous generation 13- and 15-inch unibody models continued to sell with updated processors. The third generation model was a quarter thinner than its predecessor and introduced the Retina Display with a much higher screen resolution. A 13-inch variant was released in October 2012.
MacBook Pro Apple unveiled fourth generation 13- and 15-inch MacBook Pro models during a press event at their headquarters on October 27, 2016. The models introduced the Touch Bar, a multi-touch enabled OLED strip built into the top of the keyboard in place of the function keys. They include a sapphire-glass covered Touch ID sensor at the right end of the Touch Bar which doubles as a power button. The models also introduce a "second-generation" butterfly mechanism keyboard that provided more travel than the first iteration implemented on the Retina MacBook. The 13-inch model has a trackpad that is 46% larger than its predecessor while the 15-inch model has a trackpad twice as large as the prior generation.