answers: October 2012
context: is thinner than its predecessor and is the first to include a high-resolution Retina Display. A 13-inch variant was released in October 2012. The fourth generation MacBook Pro was announced on October 27, 2016. It replaces the function keys with an interactive, multi-touch "Touch Bar" and a Touch ID sensor integrated into the Power button. The original 15-inch MacBook Pro was announced on January 10, 2006 by Steve Jobs at the Macworld Conference & Expo. The 17-inch model was unveiled on April 24, 2006. The first design was largely a carryover from the PowerBook G4, but uses Intel Core CPUs </s> IMac Pro iMac Pro is an all-in-one personal computer and workstation designed, manufactured, and sold by Apple Inc. starting December 14, 2017. Unlike the Mac Pro, Apple claims the iMac Pro is the most powerful Mac ever made. The iMac Pro comes with a custom Apple T2 chip (which stores encrypted keys) and a custom version of macOS High Sierra which allows the user to lock down the booting process (using the Startup Security Utility). The iMac Pro was introduced at WWDC on June 5, 2017 and was released in December 2017, with a starting price of US$4999. Some of </s> Pro units without Touch Bar, manufactured between October 2016 and October 2017, may have the built-in battery expanded, which is also known as "swelling". Apple initiated a free replacement program for eligible units. A "limited number" of 128GB and 256GB solid-state drives (SSD) used in 13-inch MacBook Pro (non Touch Bar) units have an issue that may result in data loss and failure of the drive. 13-inch MacBook Pro units with affected drives were sold between June 2017 and June 2018. This resulted in Apple launching a repair program for those affected- the repair involves the update of firmware. Some
question: when was the latest macbook pro retina released