https://www.ninjastik.com/support/2018-macbook-pro-boot-from-usb/Mac Book Pro: Boot into Recovery ModeTo access Recovery Mode, turn off your Macbook, turn it on and hold the
MacBook 2015 Retina 12 inch, sceen and trackpad are calibrated before ship out the factory. Back cover is glued. It
Keyboard test: Open and use the Keyboard Viewerhttps://support.apple.com/kb/PH25242?locale=en_US1. Click the Input menu in the menu bar, then choose Show Keyboard